used default cancellation token (#15594)

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/CSharpNetCoreClientCodegen.java

@@ -68,6 +68,17 @@ public class CSharpNetCoreClientCodegen extends AbstractCSharpCodegen {
     // Project Variable, determined from target framework. Not intended to be user-settable.
     protected static final String TARGET_FRAMEWORK_VERSION = "targetFrameworkVersion";
 
+    protected static final String NET_STANDARD_14_OR_LATER = "netstandard14OrLater";
+    protected static final String NET_STANDARD_15_OR_LATER = "netstandard15OrLater";
+    protected static final String NET_STANDARD_16_OR_LATER = "netstandard16OrLater";
+    protected static final String NET_STANDARD_20_OR_LATER = "netstandard20OrLater";
+    protected static final String NET_STANDARD_21_OR_LATER = "netstandard21OrLater";
+    protected static final String NET_CORE_APP_31_OR_LATER = "netcoreapp31OrLater";
+    protected static final String NET_47_OR_LATER = "net47OrLater";
+    protected static final String NET_48_OR_LATER = "net48OrLater";
+    protected static final String NET_60_OR_LATER = "net60OrLater";
+    protected static final String NET_70_OR_LATER = "net70OrLater";
+
     @SuppressWarnings("hiding")
     private final Logger LOGGER = LoggerFactory.getLogger(CSharpClientCodegen.class);
     private static final List<FrameworkStrategy> frameworkStrategies = Arrays.asList(
@@ -1401,6 +1412,77 @@ public class CSharpNetCoreClientCodegen extends AbstractCSharpCodegen {
         for (FrameworkStrategy frameworkStrategy : frameworkStrategies) {
             properties.put(frameworkStrategy.name, strategies.stream().anyMatch(s -> s.name.equals(frameworkStrategy.name)));
         }
+
+        if (strategies.stream().anyMatch(p -> Boolean.FALSE.equals(p.name == "netstandard1.3"))) {
+            if (strategies.stream().anyMatch(p -> Boolean.TRUE.equals(p.name == "netstandard1.4"))) {
+                properties.put(NET_STANDARD_14_OR_LATER, true);
+            } else if (strategies.stream().anyMatch(p -> Boolean.TRUE.equals(p.name == "netstandard1.5"))) {
+                properties.put(NET_STANDARD_14_OR_LATER, true);
+                properties.put(NET_STANDARD_15_OR_LATER, true);
+            } else if (strategies.stream().anyMatch(p -> Boolean.TRUE.equals(p.name == "netstandard1.6"))) {
+                properties.put(NET_STANDARD_14_OR_LATER, true);
+                properties.put(NET_STANDARD_15_OR_LATER, true);
+                properties.put(NET_STANDARD_16_OR_LATER, true);
+            } else if (strategies.stream().anyMatch(p -> Boolean.TRUE.equals(p.name == "netstandard2.0"))) {
+                properties.put(NET_STANDARD_14_OR_LATER, true);
+                properties.put(NET_STANDARD_15_OR_LATER, true);
+                properties.put(NET_STANDARD_16_OR_LATER, true);
+                properties.put(NET_STANDARD_20_OR_LATER, true);
+            } else if (strategies.stream().anyMatch(p -> Boolean.TRUE.equals(p.name == "netstandard2.1"))) {
+                properties.put(NET_STANDARD_14_OR_LATER, true);
+                properties.put(NET_STANDARD_15_OR_LATER, true);
+                properties.put(NET_STANDARD_16_OR_LATER, true);
+                properties.put(NET_STANDARD_20_OR_LATER, true);
+                properties.put(NET_STANDARD_21_OR_LATER, true);
+            } else if (strategies.stream().anyMatch(p -> Boolean.TRUE.equals(p.name == "netcoreapp3.1"))) {
+                properties.put(NET_STANDARD_14_OR_LATER, true);
+                properties.put(NET_STANDARD_15_OR_LATER, true);
+                properties.put(NET_STANDARD_16_OR_LATER, true);
+                properties.put(NET_STANDARD_20_OR_LATER, true);
+                properties.put(NET_STANDARD_21_OR_LATER, true);
+                properties.put(NET_CORE_APP_31_OR_LATER, true);
+            } else if (strategies.stream().anyMatch(p -> Boolean.TRUE.equals(p.name == "net47"))) {
+                properties.put(NET_STANDARD_14_OR_LATER, true);
+                properties.put(NET_STANDARD_15_OR_LATER, true);
+                properties.put(NET_STANDARD_16_OR_LATER, true);
+                properties.put(NET_STANDARD_20_OR_LATER, true);
+                properties.put(NET_STANDARD_21_OR_LATER, true);
+                properties.put(NET_CORE_APP_31_OR_LATER, true);
+                properties.put(NET_47_OR_LATER, true);
+            } else if (strategies.stream().anyMatch(p -> Boolean.TRUE.equals(p.name == "net48"))) {
+                properties.put(NET_STANDARD_14_OR_LATER, true);
+                properties.put(NET_STANDARD_15_OR_LATER, true);
+                properties.put(NET_STANDARD_16_OR_LATER, true);
+                properties.put(NET_STANDARD_20_OR_LATER, true);
+                properties.put(NET_STANDARD_21_OR_LATER, true);
+                properties.put(NET_CORE_APP_31_OR_LATER, true);
+                properties.put(NET_47_OR_LATER, true);
+                properties.put(NET_48_OR_LATER, true);
+            } else if (strategies.stream().anyMatch(p -> Boolean.TRUE.equals(p.name == "net6.0"))) {
+                properties.put(NET_STANDARD_14_OR_LATER, true);
+                properties.put(NET_STANDARD_15_OR_LATER, true);
+                properties.put(NET_STANDARD_16_OR_LATER, true);
+                properties.put(NET_STANDARD_20_OR_LATER, true);
+                properties.put(NET_STANDARD_21_OR_LATER, true);
+                properties.put(NET_CORE_APP_31_OR_LATER, true);
+                properties.put(NET_47_OR_LATER, true);
+                properties.put(NET_48_OR_LATER, true);
+                properties.put(NET_60_OR_LATER, true);
+            } else if (strategies.stream().anyMatch(p -> Boolean.TRUE.equals(p.name == "net7.0"))){
+                properties.put(NET_STANDARD_14_OR_LATER, true);
+                properties.put(NET_STANDARD_15_OR_LATER, true);
+                properties.put(NET_STANDARD_16_OR_LATER, true);
+                properties.put(NET_STANDARD_20_OR_LATER, true);
+                properties.put(NET_STANDARD_21_OR_LATER, true);
+                properties.put(NET_CORE_APP_31_OR_LATER, true);
+                properties.put(NET_47_OR_LATER, true);
+                properties.put(NET_48_OR_LATER, true);
+                properties.put(NET_60_OR_LATER, true);
+                properties.put(NET_70_OR_LATER, true);
+            } else {
+                throw new RuntimeException("Unhanlded case");
+            }
+        }
     }
 
     /**

modules/openapi-generator/src/main/resources/csharp-netcore/libraries/generichost/HttpSigningConfiguration.mustache

@@ -90,7 +90,7 @@ namespace {{packageName}}.{{clientPackage}}
         /// <param name="request"></param>
         /// <param name="requestBody"></param>
         /// <param name="cancellationToken"></param>
-        internal Dictionary<string, string> GetHttpSignedHeader(System.Net.Http.HttpRequestMessage request, string requestBody, System.Threading.CancellationToken? cancellationToken = null)
+        internal Dictionary<string, string> GetHttpSignedHeader(System.Net.Http.HttpRequestMessage request, string requestBody, System.Threading.CancellationToken cancellationToken = default{{^netstandard20OrLater}}(System.Threading.CancellationToken){{/netstandard20OrLater}})
         {
             if (request.RequestUri == null)
                 throw new NullReferenceException("The request URI was null");

modules/openapi-generator/src/main/resources/csharp-netcore/libraries/generichost/HttpSigningToken.mustache

@@ -34,7 +34,7 @@ namespace {{packageName}}.{{clientPackage}}
         /// <param name="request"></param>
         /// <param name="requestBody"></param>
         /// <param name="cancellationToken"></param>
-        public void UseInHeader(System.Net.Http.HttpRequestMessage request, string requestBody, CancellationToken? cancellationToken = null)
+        public void UseInHeader(System.Net.Http.HttpRequestMessage request, string requestBody, CancellationToken cancellationToken = default{{^netstandard20OrLater}}(System.Threading.CancellationToken){{/netstandard20OrLater}})
         {
             var signedHeaders = _configuration.GetHttpSignedHeader(request, requestBody, cancellationToken);
 

modules/openapi-generator/src/main/resources/csharp-netcore/libraries/generichost/OperationSignature.mustache

@@ -1 +1 @@
-{{#lambda.joinWithComma}}{{#allParams}}{{^notRequiredOrIsNullable}}{{#lambda.required}}{{{dataType}}}{{/lambda.required}}{{/notRequiredOrIsNullable}}{{#notRequiredOrIsNullable}}{{#lambda.optional}}{{{dataType}}}{{/lambda.optional}}{{/notRequiredOrIsNullable}} {{paramName}}{{^requiredAndNotNullable}} = null{{/requiredAndNotNullable}}  {{/allParams}}System.Threading.CancellationToken? cancellationToken = null{{/lambda.joinWithComma}}
+{{#lambda.joinWithComma}}{{#allParams}}{{^notRequiredOrIsNullable}}{{#lambda.required}}{{{dataType}}}{{/lambda.required}}{{/notRequiredOrIsNullable}}{{#notRequiredOrIsNullable}}{{#lambda.optional}}{{{dataType}}}{{/lambda.optional}}{{/notRequiredOrIsNullable}} {{paramName}}{{^requiredAndNotNullable}} = null{{/requiredAndNotNullable}}  {{/allParams}}System.Threading.CancellationToken cancellationToken = default{{^netstandard20OrLater}}(System.Threading.CancellationToken){{/netstandard20OrLater}}{{/lambda.joinWithComma}}

modules/openapi-generator/src/main/resources/csharp-netcore/libraries/generichost/RateLimitProvider`1.mustache

@@ -40,9 +40,8 @@ namespace {{packageName}}.{{clientPackage}} {{^netStandard}}
             for (int i = 0; i < _tokens.Length; i++)
                 _tokens[i].TokenBecameAvailable += ((sender) => AvailableTokens.Writer.TryWrite((TTokenBase) sender));
         }
-
-        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null) 
-            => await AvailableTokens.Reader.ReadAsync(cancellation.GetValueOrDefault()).ConfigureAwait(false);
+        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default{{^netstandard20OrLater}}(System.Threading.CancellationToken){{/netstandard20OrLater}})
+            => await AvailableTokens.Reader.ReadAsync(cancellation).ConfigureAwait(false);
     }
 } {{/netStandard}}{{#netStandard}}
 {
@@ -77,7 +76,7 @@ namespace {{packageName}}.{{clientPackage}} {{^netStandard}}
             }
         }
 
-        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null)
+        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default{{^netstandard20OrLater}}(System.Threading.CancellationToken){{/netstandard20OrLater}})
         {
             await _semaphore.WaitAsync().ConfigureAwait(false);
 
@@ -105,4 +104,4 @@ namespace {{packageName}}.{{clientPackage}} {{^netStandard}}
             }
         }
     }
-} {{/netStandard}}
+}{{/netStandard}}

modules/openapi-generator/src/main/resources/csharp-netcore/libraries/generichost/TokenProvider`1.mustache

@@ -21,7 +21,7 @@ namespace {{packageName}}
         /// </summary>
         protected TTokenBase[] _tokens;
 
-        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null);
+        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default{{^netstandard20OrLater}}(System.Threading.CancellationToken){{/netstandard20OrLater}});
 
         /// <summary>
         /// Instantiates a TokenProvider.

modules/openapi-generator/src/main/resources/csharp-netcore/libraries/generichost/api.mustache

@@ -375,7 +375,7 @@ namespace {{packageName}}.{{apiPackage}}
 
                     tokenBaseLocalVars.Add(httpSignatureTokenLocalVar);
 
-                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content{{nrt!}}.ReadAsStringAsync({{^netStandard}}{{^netcoreapp3.1}}cancellationToken.GetValueOrDefault(){{/netcoreapp3.1}}{{/netStandard}}).ConfigureAwait(false);
+                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content{{nrt!}}.ReadAsStringAsync({{#net60OrLater}}cancellationToken{{/net60OrLater}}).ConfigureAwait(false);
 
                     httpSignatureTokenLocalVar.UseInHeader(httpRequestMessageLocalVar, requestBodyLocalVar, cancellationToken);{{/isHttpSignature}}{{/authMethods}}{{#consumes}}{{#-first}}
 
@@ -407,11 +407,11 @@ namespace {{packageName}}.{{apiPackage}}
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "{{path}}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync({{^netStandard}}{{^netcoreapp3.1}}cancellationToken.GetValueOrDefault(){{/netcoreapp3.1}}{{/netStandard}}).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync({{#net60OrLater}}cancellationToken{{/net60OrLater}}).ConfigureAwait(false);
 
                         ApiResponse<{{#returnType}}{{{returnType}}}{{/returnType}}{{^returnType}}object{{/returnType}}> apiResponseLocalVar = new ApiResponse<{{#returnType}}{{{returnType}}}{{/returnType}}{{^returnType}}object{{/returnType}}>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt/src/Org.OpenAPITools/Api/AnotherFakeApi.cs

@@ -39,7 +39,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test special tags
@@ -50,7 +50,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ModelClient&gt;?&gt;</returns>
-        Task<ApiResponse<ModelClient>?> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>?> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -174,7 +174,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>?> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>?> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -193,7 +193,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -238,11 +238,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/another-fake/dummy", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<ModelClient> apiResponseLocalVar = new ApiResponse<ModelClient>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt/src/Org.OpenAPITools/Api/DefaultApi.cs

@@ -38,7 +38,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;FooGetDefaultResponse&gt;&gt;</returns>
-        Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;FooGetDefaultResponse&gt;?&gt;</returns>
-        Task<ApiResponse<FooGetDefaultResponse>?> FooGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<FooGetDefaultResponse>?> FooGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -60,7 +60,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -71,7 +71,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Hello
@@ -82,7 +82,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;Guid&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Hello
@@ -92,7 +92,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;Guid&gt;&gt;?&gt;</returns>
-        Task<ApiResponse<List<Guid>>?> HelloOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Guid>>?> HelloOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -203,7 +203,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="FooGetDefaultResponse"/></returns>
-        public async Task<ApiResponse<FooGetDefaultResponse>?> FooGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<FooGetDefaultResponse>?> FooGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -221,7 +221,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="FooGetDefaultResponse"/></returns>
-        public async Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -253,11 +253,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/foo", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<FooGetDefaultResponse> apiResponseLocalVar = new ApiResponse<FooGetDefaultResponse>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -320,7 +320,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -339,7 +339,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -381,11 +381,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/country", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -435,7 +435,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Guid&gt;"/></returns>
-        public async Task<ApiResponse<List<Guid>>?> HelloOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Guid>>?> HelloOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -453,7 +453,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Guid&gt;"/></returns>
-        public async Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -485,11 +485,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/hello", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<List<Guid>> apiResponseLocalVar = new ApiResponse<List<Guid>>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt/src/Org.OpenAPITools/Api/FakeApi.cs

@@ -38,7 +38,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;HealthCheckResult&gt;&gt;</returns>
-        Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Health check endpoint
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;HealthCheckResult&gt;?&gt;</returns>
-        Task<ApiResponse<HealthCheckResult>?> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<HealthCheckResult>?> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -60,7 +60,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;bool&gt;&gt;</returns>
-        Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -71,7 +71,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;bool&gt;?&gt;</returns>
-        Task<ApiResponse<bool>?> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<bool>?> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -83,7 +83,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;OuterComposite&gt;&gt;</returns>
-        Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite? outerComposite = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite? outerComposite = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -94,7 +94,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;OuterComposite&gt;?&gt;</returns>
-        Task<ApiResponse<OuterComposite>?> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite? outerComposite = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<OuterComposite>?> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite? outerComposite = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -106,7 +106,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;decimal&gt;&gt;</returns>
-        Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -117,7 +117,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;decimal&gt;?&gt;</returns>
-        Task<ApiResponse<decimal>?> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<decimal>?> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -130,7 +130,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;string&gt;&gt;</returns>
-        Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -142,7 +142,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;string&gt;?&gt;</returns>
-        Task<ApiResponse<string>?> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>?> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Array of Enums
@@ -153,7 +153,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;OuterEnum&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Array of Enums
@@ -163,7 +163,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;OuterEnum&gt;&gt;?&gt;</returns>
-        Task<ApiResponse<List<OuterEnum>>?> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<OuterEnum>>?> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -175,7 +175,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -186,7 +186,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -199,7 +199,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -211,7 +211,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test \&quot;client\&quot; model
@@ -223,7 +223,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test \&quot;client\&quot; model
@@ -234,7 +234,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ModelClient&gt;?&gt;</returns>
-        Task<ApiResponse<ModelClient>?> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>?> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
@@ -259,7 +259,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream? binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string? _string = null, string? password = null, string? callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream? binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string? _string = null, string? password = null, string? callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
@@ -283,7 +283,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream? binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string? _string = null, string? password = null, string? callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream? binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string? _string = null, string? password = null, string? callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test enum parameters
@@ -302,7 +302,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestEnumParametersAsync(List<string>? enumHeaderStringArray = null, List<string>? enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string>? enumFormStringArray = null, string? enumHeaderString = null, string? enumQueryString = null, string? enumFormString = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestEnumParametersAsync(List<string>? enumHeaderStringArray = null, List<string>? enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string>? enumFormStringArray = null, string? enumHeaderString = null, string? enumQueryString = null, string? enumFormString = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test enum parameters
@@ -320,7 +320,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> TestEnumParametersOrDefaultAsync(List<string>? enumHeaderStringArray = null, List<string>? enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string>? enumFormStringArray = null, string? enumHeaderString = null, string? enumQueryString = null, string? enumFormString = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> TestEnumParametersOrDefaultAsync(List<string>? enumHeaderStringArray = null, List<string>? enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string>? enumFormStringArray = null, string? enumHeaderString = null, string? enumQueryString = null, string? enumFormString = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint to test group parameters (optional)
@@ -337,7 +337,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint to test group parameters (optional)
@@ -353,7 +353,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test inline additionalProperties
@@ -365,7 +365,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test inline additionalProperties
@@ -376,7 +376,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test json serialization of form data
@@ -389,7 +389,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test json serialization of form data
@@ -401,7 +401,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -417,7 +417,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -432,7 +432,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -543,7 +543,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="HealthCheckResult"/></returns>
-        public async Task<ApiResponse<HealthCheckResult>?> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<HealthCheckResult>?> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -561,7 +561,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="HealthCheckResult"/></returns>
-        public async Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -593,11 +593,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/health", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<HealthCheckResult> apiResponseLocalVar = new ApiResponse<HealthCheckResult>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -651,7 +651,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="bool"/></returns>
-        public async Task<ApiResponse<bool>?> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<bool>?> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -670,7 +670,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="bool"/></returns>
-        public async Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -715,11 +715,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/boolean", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<bool> apiResponseLocalVar = new ApiResponse<bool>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -773,7 +773,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="OuterComposite"/></returns>
-        public async Task<ApiResponse<OuterComposite>?> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite? outerComposite = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<OuterComposite>?> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite? outerComposite = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -792,7 +792,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="OuterComposite"/></returns>
-        public async Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite? outerComposite = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite? outerComposite = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -837,11 +837,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/composite", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<OuterComposite> apiResponseLocalVar = new ApiResponse<OuterComposite>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -895,7 +895,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="decimal"/></returns>
-        public async Task<ApiResponse<decimal>?> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<decimal>?> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -914,7 +914,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="decimal"/></returns>
-        public async Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -959,11 +959,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/number", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<decimal> apiResponseLocalVar = new ApiResponse<decimal>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1030,7 +1030,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>?> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>?> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1050,7 +1050,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1103,11 +1103,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/string", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<string> apiResponseLocalVar = new ApiResponse<string>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1157,7 +1157,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;OuterEnum&gt;"/></returns>
-        public async Task<ApiResponse<List<OuterEnum>>?> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<OuterEnum>>?> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1175,7 +1175,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;OuterEnum&gt;"/></returns>
-        public async Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1207,11 +1207,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/array-of-enums", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<List<OuterEnum>> apiResponseLocalVar = new ApiResponse<List<OuterEnum>>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1274,7 +1274,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1293,7 +1293,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1329,11 +1329,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/body-with-file-schema", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1403,7 +1403,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1423,7 +1423,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1467,11 +1467,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/body-with-query-params", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1534,7 +1534,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>?> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>?> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1553,7 +1553,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1598,11 +1598,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<ModelClient> apiResponseLocalVar = new ApiResponse<ModelClient>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1726,7 +1726,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream? binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string? _string = null, string? password = null, string? callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream? binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string? _string = null, string? password = null, string? callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1758,7 +1758,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream? binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string? _string = null, string? password = null, string? callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream? binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string? _string = null, string? password = null, string? callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1864,11 +1864,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1954,7 +1954,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> TestEnumParametersOrDefaultAsync(List<string>? enumHeaderStringArray = null, List<string>? enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string>? enumFormStringArray = null, string? enumHeaderString = null, string? enumQueryString = null, string? enumFormString = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> TestEnumParametersOrDefaultAsync(List<string>? enumHeaderStringArray = null, List<string>? enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string>? enumFormStringArray = null, string? enumHeaderString = null, string? enumQueryString = null, string? enumFormString = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1980,7 +1980,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestEnumParametersAsync(List<string>? enumHeaderStringArray = null, List<string>? enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string>? enumFormStringArray = null, string? enumHeaderString = null, string? enumQueryString = null, string? enumFormString = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestEnumParametersAsync(List<string>? enumHeaderStringArray = null, List<string>? enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string>? enumFormStringArray = null, string? enumHeaderString = null, string? enumQueryString = null, string? enumFormString = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2053,11 +2053,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -2146,7 +2146,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2170,7 +2170,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2225,11 +2225,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -2296,7 +2296,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2315,7 +2315,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2351,11 +2351,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/inline-additionalProperties", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -2425,7 +2425,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2445,7 +2445,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2493,11 +2493,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/jsonFormData", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -2588,7 +2588,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2611,7 +2611,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2649,11 +2649,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/test-query-parameters", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs

@@ -39,7 +39,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test class name in snake case
@@ -50,7 +50,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ModelClient&gt;?&gt;</returns>
-        Task<ApiResponse<ModelClient>?> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>?> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -174,7 +174,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>?> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>?> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -193,7 +193,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -248,11 +248,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake_classname_test", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<ModelClient> apiResponseLocalVar = new ApiResponse<ModelClient>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt/src/Org.OpenAPITools/Api/PetApi.cs

@@ -39,7 +39,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Add a new pet to the store
@@ -50,7 +50,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Deletes a pet
@@ -63,7 +63,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeletePetAsync(long petId, string? apiKey = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeletePetAsync(long petId, string? apiKey = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Deletes a pet
@@ -75,7 +75,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> DeletePetOrDefaultAsync(long petId, string? apiKey = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> DeletePetOrDefaultAsync(long petId, string? apiKey = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by status
@@ -87,7 +87,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;Pet&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by status
@@ -98,7 +98,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;Pet&gt;&gt;?&gt;</returns>
-        Task<ApiResponse<List<Pet>>?> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>?> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by tags
@@ -110,7 +110,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;Pet&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by tags
@@ -121,7 +121,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;Pet&gt;&gt;?&gt;</returns>
-        Task<ApiResponse<List<Pet>>?> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>?> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find pet by ID
@@ -133,7 +133,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Pet&gt;&gt;</returns>
-        Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find pet by ID
@@ -144,7 +144,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Pet&gt;?&gt;</returns>
-        Task<ApiResponse<Pet>?> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Pet>?> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Update an existing pet
@@ -156,7 +156,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Update an existing pet
@@ -167,7 +167,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updates a pet in the store with form data
@@ -181,7 +181,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string? name = null, string? status = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string? name = null, string? status = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updates a pet in the store with form data
@@ -194,7 +194,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> UpdatePetWithFormOrDefaultAsync(long petId, string? name = null, string? status = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> UpdatePetWithFormOrDefaultAsync(long petId, string? name = null, string? status = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image
@@ -208,7 +208,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ApiResponse&gt;&gt;</returns>
-        Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream? file = null, string? additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream? file = null, string? additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image
@@ -221,7 +221,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ApiResponse&gt;?&gt;</returns>
-        Task<ApiResponse<ApiResponse>?> UploadFileOrDefaultAsync(long petId, System.IO.Stream? file = null, string? additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>?> UploadFileOrDefaultAsync(long petId, System.IO.Stream? file = null, string? additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image (required)
@@ -235,7 +235,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ApiResponse&gt;&gt;</returns>
-        Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string? additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string? additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image (required)
@@ -248,7 +248,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ApiResponse&gt;?&gt;</returns>
-        Task<ApiResponse<ApiResponse>?> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string? additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>?> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string? additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -372,7 +372,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -391,7 +391,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -426,7 +426,7 @@ namespace Org.OpenAPITools.Api
 
                     tokenBaseLocalVars.Add(httpSignatureTokenLocalVar);
 
-                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content!.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content!.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                     httpSignatureTokenLocalVar.UseInHeader(httpRequestMessageLocalVar, requestBodyLocalVar, cancellationToken);
 
@@ -444,11 +444,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -523,7 +523,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> DeletePetOrDefaultAsync(long petId, string? apiKey = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> DeletePetOrDefaultAsync(long petId, string? apiKey = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -543,7 +543,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeletePetAsync(long petId, string? apiKey = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeletePetAsync(long petId, string? apiKey = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -579,11 +579,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -650,7 +650,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>?> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>?> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -669,7 +669,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -706,7 +706,7 @@ namespace Org.OpenAPITools.Api
 
                     tokenBaseLocalVars.Add(httpSignatureTokenLocalVar);
 
-                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content!.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content!.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                     httpSignatureTokenLocalVar.UseInHeader(httpRequestMessageLocalVar, requestBodyLocalVar, cancellationToken);
 
@@ -724,11 +724,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/findByStatus", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<List<Pet>> apiResponseLocalVar = new ApiResponse<List<Pet>>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -799,7 +799,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>?> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>?> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -818,7 +818,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -855,7 +855,7 @@ namespace Org.OpenAPITools.Api
 
                     tokenBaseLocalVars.Add(httpSignatureTokenLocalVar);
 
-                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content!.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content!.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                     httpSignatureTokenLocalVar.UseInHeader(httpRequestMessageLocalVar, requestBodyLocalVar, cancellationToken);
 
@@ -873,11 +873,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/findByTags", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<List<Pet>> apiResponseLocalVar = new ApiResponse<List<Pet>>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -948,7 +948,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Pet"/></returns>
-        public async Task<ApiResponse<Pet>?> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Pet>?> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -967,7 +967,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Pet"/></returns>
-        public async Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1006,11 +1006,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<Pet> apiResponseLocalVar = new ApiResponse<Pet>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1077,7 +1077,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1096,7 +1096,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1131,7 +1131,7 @@ namespace Org.OpenAPITools.Api
 
                     tokenBaseLocalVars.Add(httpSignatureTokenLocalVar);
 
-                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content!.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content!.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                     httpSignatureTokenLocalVar.UseInHeader(httpRequestMessageLocalVar, requestBodyLocalVar, cancellationToken);
 
@@ -1149,11 +1149,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1232,7 +1232,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> UpdatePetWithFormOrDefaultAsync(long petId, string? name = null, string? status = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> UpdatePetWithFormOrDefaultAsync(long petId, string? name = null, string? status = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1253,7 +1253,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string? name = null, string? status = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string? name = null, string? status = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1308,11 +1308,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1387,7 +1387,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>?> UploadFileOrDefaultAsync(long petId, System.IO.Stream? file = null, string? additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>?> UploadFileOrDefaultAsync(long petId, System.IO.Stream? file = null, string? additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1408,7 +1408,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream? file = null, string? additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream? file = null, string? additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1472,11 +1472,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}/uploadImage", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<ApiResponse> apiResponseLocalVar = new ApiResponse<ApiResponse>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1554,7 +1554,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>?> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string? additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>?> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string? additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1575,7 +1575,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string? additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string? additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1639,11 +1639,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/{petId}/uploadImageWithRequiredFile", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<ApiResponse> apiResponseLocalVar = new ApiResponse<ApiResponse>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt/src/Org.OpenAPITools/Api/StoreApi.cs

@@ -39,7 +39,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Delete purchase order by ID
@@ -50,7 +50,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Returns pet inventories by status
@@ -61,7 +61,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Dictionary&lt;string, int&gt;&gt;&gt;</returns>
-        Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Returns pet inventories by status
@@ -71,7 +71,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Dictionary&lt;string, int&gt;&gt;?&gt;</returns>
-        Task<ApiResponse<Dictionary<string, int>>?> GetInventoryOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Dictionary<string, int>>?> GetInventoryOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find purchase order by ID
@@ -83,7 +83,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Order&gt;&gt;</returns>
-        Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find purchase order by ID
@@ -94,7 +94,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Order&gt;?&gt;</returns>
-        Task<ApiResponse<Order>?> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>?> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Place an order for a pet
@@ -106,7 +106,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Order&gt;&gt;</returns>
-        Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Place an order for a pet
@@ -117,7 +117,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Order&gt;?&gt;</returns>
-        Task<ApiResponse<Order>?> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>?> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -241,7 +241,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -260,7 +260,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -283,11 +283,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/order/{order_id}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -337,7 +337,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Dictionary&lt;string, int&gt;"/></returns>
-        public async Task<ApiResponse<Dictionary<string, int>>?> GetInventoryOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Dictionary<string, int>>?> GetInventoryOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -355,7 +355,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Dictionary&lt;string, int&gt;"/></returns>
-        public async Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -393,11 +393,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/inventory", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<Dictionary<string, int>> apiResponseLocalVar = new ApiResponse<Dictionary<string, int>>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -464,7 +464,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>?> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>?> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -483,7 +483,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -516,11 +516,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/order/{order_id}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<Order> apiResponseLocalVar = new ApiResponse<Order>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -583,7 +583,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>?> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>?> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -602,7 +602,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -648,11 +648,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/order", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<Order> apiResponseLocalVar = new ApiResponse<Order>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt/src/Org.OpenAPITools/Api/UserApi.cs

@@ -39,7 +39,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Create user
@@ -50,7 +50,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -62,7 +62,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -73,7 +73,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -85,7 +85,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -96,7 +96,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Delete user
@@ -108,7 +108,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Delete user
@@ -119,7 +119,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Get user by user name
@@ -131,7 +131,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;User&gt;&gt;</returns>
-        Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Get user by user name
@@ -142,7 +142,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;User&gt;?&gt;</returns>
-        Task<ApiResponse<User>?> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<User>?> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs user into the system
@@ -155,7 +155,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;string&gt;&gt;</returns>
-        Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs user into the system
@@ -167,7 +167,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;string&gt;?&gt;</returns>
-        Task<ApiResponse<string>?> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>?> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs out current logged in user session
@@ -178,7 +178,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs out current logged in user session
@@ -188,7 +188,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> LogoutUserOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> LogoutUserOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updated user
@@ -201,7 +201,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updated user
@@ -213,7 +213,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;?&gt;</returns>
-        Task<ApiResponse<object>?> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>?> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -337,7 +337,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -356,7 +356,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -392,11 +392,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -459,7 +459,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -478,7 +478,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -514,11 +514,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/createWithArray", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -581,7 +581,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -600,7 +600,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -636,11 +636,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/createWithList", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -703,7 +703,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -722,7 +722,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -745,11 +745,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/{username}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -812,7 +812,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="User"/></returns>
-        public async Task<ApiResponse<User>?> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<User>?> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -831,7 +831,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="User"/></returns>
-        public async Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -864,11 +864,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/{username}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<User> apiResponseLocalVar = new ApiResponse<User>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -938,7 +938,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>?> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>?> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -958,7 +958,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1000,11 +1000,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/login", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<string> apiResponseLocalVar = new ApiResponse<string>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1054,7 +1054,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> LogoutUserOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> LogoutUserOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1072,7 +1072,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1095,11 +1095,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/logout", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1169,7 +1169,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>?> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>?> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1189,7 +1189,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1227,11 +1227,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/{username}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs

@@ -96,7 +96,7 @@ namespace Org.OpenAPITools.Client
         /// <param name="request"></param>
         /// <param name="requestBody"></param>
         /// <param name="cancellationToken"></param>
-        internal Dictionary<string, string> GetHttpSignedHeader(System.Net.Http.HttpRequestMessage request, string requestBody, System.Threading.CancellationToken? cancellationToken = null)
+        internal Dictionary<string, string> GetHttpSignedHeader(System.Net.Http.HttpRequestMessage request, string requestBody, System.Threading.CancellationToken cancellationToken = default)
         {
             if (request.RequestUri == null)
                 throw new NullReferenceException("The request URI was null");

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt/src/Org.OpenAPITools/Client/HttpSigningToken.cs

@@ -32,7 +32,7 @@ namespace Org.OpenAPITools.Client
         /// <param name="request"></param>
         /// <param name="requestBody"></param>
         /// <param name="cancellationToken"></param>
-        public void UseInHeader(System.Net.Http.HttpRequestMessage request, string requestBody, CancellationToken? cancellationToken = null)
+        public void UseInHeader(System.Net.Http.HttpRequestMessage request, string requestBody, CancellationToken cancellationToken = default)
         {
             var signedHeaders = _configuration.GetHttpSignedHeader(request, requestBody, cancellationToken);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt/src/Org.OpenAPITools/Client/RateLimitProvider`1.cs

@@ -42,8 +42,7 @@ namespace Org.OpenAPITools.Client
             for (int i = 0; i < _tokens.Length; i++)
                 _tokens[i].TokenBecameAvailable += ((sender) => AvailableTokens.Writer.TryWrite((TTokenBase) sender));
         }
-
-        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null) 
-            => await AvailableTokens.Reader.ReadAsync(cancellation.GetValueOrDefault()).ConfigureAwait(false);
+        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default)
+            => await AvailableTokens.Reader.ReadAsync(cancellation).ConfigureAwait(false);
     }
 } 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0-nrt/src/Org.OpenAPITools/Client/TokenProvider`1.cs

@@ -27,7 +27,7 @@ namespace Org.OpenAPITools
         /// </summary>
         protected TTokenBase[] _tokens;
 
-        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null);
+        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default);
 
         /// <summary>
         /// Instantiates a TokenProvider.

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0/src/Org.OpenAPITools/Api/AnotherFakeApi.cs

@@ -37,7 +37,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test special tags
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -172,7 +172,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -191,7 +191,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -236,11 +236,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/another-fake/dummy", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<ModelClient> apiResponseLocalVar = new ApiResponse<ModelClient>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0/src/Org.OpenAPITools/Api/DefaultApi.cs

@@ -36,7 +36,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;FooGetDefaultResponse&gt;&gt;</returns>
-        Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -46,7 +46,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;FooGetDefaultResponse&gt;&gt;</returns>
-        Task<ApiResponse<FooGetDefaultResponse>> FooGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<FooGetDefaultResponse>> FooGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -58,7 +58,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -69,7 +69,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Hello
@@ -80,7 +80,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;Guid&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Hello
@@ -90,7 +90,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;Guid&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Guid>>> HelloOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Guid>>> HelloOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -201,7 +201,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="FooGetDefaultResponse"/></returns>
-        public async Task<ApiResponse<FooGetDefaultResponse>> FooGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<FooGetDefaultResponse>> FooGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -219,7 +219,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="FooGetDefaultResponse"/></returns>
-        public async Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -251,11 +251,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/foo", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<FooGetDefaultResponse> apiResponseLocalVar = new ApiResponse<FooGetDefaultResponse>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -318,7 +318,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -337,7 +337,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -379,11 +379,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/country", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -433,7 +433,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Guid&gt;"/></returns>
-        public async Task<ApiResponse<List<Guid>>> HelloOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Guid>>> HelloOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -451,7 +451,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Guid&gt;"/></returns>
-        public async Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -483,11 +483,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/hello", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<List<Guid>> apiResponseLocalVar = new ApiResponse<List<Guid>>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0/src/Org.OpenAPITools/Api/FakeApi.cs

@@ -36,7 +36,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;HealthCheckResult&gt;&gt;</returns>
-        Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Health check endpoint
@@ -46,7 +46,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;HealthCheckResult&gt;&gt;</returns>
-        Task<ApiResponse<HealthCheckResult>> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<HealthCheckResult>> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -58,7 +58,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;bool&gt;&gt;</returns>
-        Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -69,7 +69,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;bool&gt;&gt;</returns>
-        Task<ApiResponse<bool>> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<bool>> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -81,7 +81,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;OuterComposite&gt;&gt;</returns>
-        Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -92,7 +92,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;OuterComposite&gt;&gt;</returns>
-        Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -104,7 +104,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;decimal&gt;&gt;</returns>
-        Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -115,7 +115,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;decimal&gt;&gt;</returns>
-        Task<ApiResponse<decimal>> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<decimal>> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -128,7 +128,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;string&gt;&gt;</returns>
-        Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -140,7 +140,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;string&gt;&gt;</returns>
-        Task<ApiResponse<string>> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Array of Enums
@@ -151,7 +151,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;OuterEnum&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Array of Enums
@@ -161,7 +161,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;OuterEnum&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -173,7 +173,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -184,7 +184,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -197,7 +197,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -209,7 +209,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test \&quot;client\&quot; model
@@ -221,7 +221,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test \&quot;client\&quot; model
@@ -232,7 +232,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
@@ -257,7 +257,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
@@ -281,7 +281,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test enum parameters
@@ -300,7 +300,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestEnumParametersAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestEnumParametersAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test enum parameters
@@ -318,7 +318,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestEnumParametersOrDefaultAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestEnumParametersOrDefaultAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint to test group parameters (optional)
@@ -335,7 +335,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint to test group parameters (optional)
@@ -351,7 +351,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test inline additionalProperties
@@ -363,7 +363,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test inline additionalProperties
@@ -374,7 +374,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test json serialization of form data
@@ -387,7 +387,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test json serialization of form data
@@ -399,7 +399,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -415,7 +415,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -430,7 +430,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -541,7 +541,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="HealthCheckResult"/></returns>
-        public async Task<ApiResponse<HealthCheckResult>> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<HealthCheckResult>> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -559,7 +559,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="HealthCheckResult"/></returns>
-        public async Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -591,11 +591,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/health", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<HealthCheckResult> apiResponseLocalVar = new ApiResponse<HealthCheckResult>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -649,7 +649,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="bool"/></returns>
-        public async Task<ApiResponse<bool>> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<bool>> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -668,7 +668,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="bool"/></returns>
-        public async Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -713,11 +713,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/boolean", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<bool> apiResponseLocalVar = new ApiResponse<bool>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -771,7 +771,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="OuterComposite"/></returns>
-        public async Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -790,7 +790,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="OuterComposite"/></returns>
-        public async Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -835,11 +835,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/composite", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<OuterComposite> apiResponseLocalVar = new ApiResponse<OuterComposite>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -893,7 +893,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="decimal"/></returns>
-        public async Task<ApiResponse<decimal>> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<decimal>> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -912,7 +912,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="decimal"/></returns>
-        public async Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -957,11 +957,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/number", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<decimal> apiResponseLocalVar = new ApiResponse<decimal>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1028,7 +1028,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1048,7 +1048,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1101,11 +1101,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/string", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<string> apiResponseLocalVar = new ApiResponse<string>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1155,7 +1155,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;OuterEnum&gt;"/></returns>
-        public async Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1173,7 +1173,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;OuterEnum&gt;"/></returns>
-        public async Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1205,11 +1205,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/array-of-enums", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<List<OuterEnum>> apiResponseLocalVar = new ApiResponse<List<OuterEnum>>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1272,7 +1272,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1291,7 +1291,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1327,11 +1327,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/body-with-file-schema", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1401,7 +1401,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1421,7 +1421,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1465,11 +1465,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/body-with-query-params", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1532,7 +1532,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1551,7 +1551,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1596,11 +1596,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<ModelClient> apiResponseLocalVar = new ApiResponse<ModelClient>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1724,7 +1724,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1756,7 +1756,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1862,11 +1862,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1952,7 +1952,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestEnumParametersOrDefaultAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestEnumParametersOrDefaultAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1978,7 +1978,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestEnumParametersAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestEnumParametersAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2051,11 +2051,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -2144,7 +2144,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2168,7 +2168,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2223,11 +2223,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -2294,7 +2294,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2313,7 +2313,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2349,11 +2349,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/inline-additionalProperties", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -2423,7 +2423,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2443,7 +2443,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2491,11 +2491,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/jsonFormData", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -2586,7 +2586,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2609,7 +2609,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2647,11 +2647,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/test-query-parameters", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs

@@ -37,7 +37,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test class name in snake case
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -172,7 +172,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -191,7 +191,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -246,11 +246,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake_classname_test", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<ModelClient> apiResponseLocalVar = new ApiResponse<ModelClient>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0/src/Org.OpenAPITools/Api/PetApi.cs

@@ -37,7 +37,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Add a new pet to the store
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Deletes a pet
@@ -61,7 +61,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeletePetAsync(long petId, string apiKey = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeletePetAsync(long petId, string apiKey = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Deletes a pet
@@ -73,7 +73,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeletePetOrDefaultAsync(long petId, string apiKey = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeletePetOrDefaultAsync(long petId, string apiKey = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by status
@@ -85,7 +85,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;Pet&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by status
@@ -96,7 +96,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;Pet&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Pet>>> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by tags
@@ -108,7 +108,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;Pet&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by tags
@@ -119,7 +119,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;Pet&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Pet>>> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find pet by ID
@@ -131,7 +131,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Pet&gt;&gt;</returns>
-        Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find pet by ID
@@ -142,7 +142,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Pet&gt;&gt;</returns>
-        Task<ApiResponse<Pet>> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Pet>> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Update an existing pet
@@ -154,7 +154,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Update an existing pet
@@ -165,7 +165,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updates a pet in the store with form data
@@ -179,7 +179,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updates a pet in the store with form data
@@ -192,7 +192,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdatePetWithFormOrDefaultAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdatePetWithFormOrDefaultAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image
@@ -206,7 +206,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ApiResponse&gt;&gt;</returns>
-        Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image
@@ -219,7 +219,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ApiResponse&gt;&gt;</returns>
-        Task<ApiResponse<ApiResponse>> UploadFileOrDefaultAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>> UploadFileOrDefaultAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image (required)
@@ -233,7 +233,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ApiResponse&gt;&gt;</returns>
-        Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image (required)
@@ -246,7 +246,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ApiResponse&gt;&gt;</returns>
-        Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -370,7 +370,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -389,7 +389,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -424,7 +424,7 @@ namespace Org.OpenAPITools.Api
 
                     tokenBaseLocalVars.Add(httpSignatureTokenLocalVar);
 
-                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                     httpSignatureTokenLocalVar.UseInHeader(httpRequestMessageLocalVar, requestBodyLocalVar, cancellationToken);
 
@@ -442,11 +442,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -521,7 +521,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeletePetOrDefaultAsync(long petId, string apiKey = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeletePetOrDefaultAsync(long petId, string apiKey = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -541,7 +541,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeletePetAsync(long petId, string apiKey = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeletePetAsync(long petId, string apiKey = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -577,11 +577,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -648,7 +648,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -667,7 +667,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -704,7 +704,7 @@ namespace Org.OpenAPITools.Api
 
                     tokenBaseLocalVars.Add(httpSignatureTokenLocalVar);
 
-                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                     httpSignatureTokenLocalVar.UseInHeader(httpRequestMessageLocalVar, requestBodyLocalVar, cancellationToken);
 
@@ -722,11 +722,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/findByStatus", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<List<Pet>> apiResponseLocalVar = new ApiResponse<List<Pet>>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -797,7 +797,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -816,7 +816,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -853,7 +853,7 @@ namespace Org.OpenAPITools.Api
 
                     tokenBaseLocalVars.Add(httpSignatureTokenLocalVar);
 
-                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                     httpSignatureTokenLocalVar.UseInHeader(httpRequestMessageLocalVar, requestBodyLocalVar, cancellationToken);
 
@@ -871,11 +871,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/findByTags", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<List<Pet>> apiResponseLocalVar = new ApiResponse<List<Pet>>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -946,7 +946,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Pet"/></returns>
-        public async Task<ApiResponse<Pet>> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Pet>> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -965,7 +965,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Pet"/></returns>
-        public async Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1004,11 +1004,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<Pet> apiResponseLocalVar = new ApiResponse<Pet>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1075,7 +1075,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1094,7 +1094,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1129,7 +1129,7 @@ namespace Org.OpenAPITools.Api
 
                     tokenBaseLocalVars.Add(httpSignatureTokenLocalVar);
 
-                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                    string requestBodyLocalVar = await httpRequestMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                     httpSignatureTokenLocalVar.UseInHeader(httpRequestMessageLocalVar, requestBodyLocalVar, cancellationToken);
 
@@ -1147,11 +1147,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1230,7 +1230,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdatePetWithFormOrDefaultAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdatePetWithFormOrDefaultAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1251,7 +1251,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1306,11 +1306,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1385,7 +1385,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>> UploadFileOrDefaultAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>> UploadFileOrDefaultAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1406,7 +1406,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1470,11 +1470,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}/uploadImage", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<ApiResponse> apiResponseLocalVar = new ApiResponse<ApiResponse>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1552,7 +1552,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1573,7 +1573,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1637,11 +1637,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/{petId}/uploadImageWithRequiredFile", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<ApiResponse> apiResponseLocalVar = new ApiResponse<ApiResponse>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0/src/Org.OpenAPITools/Api/StoreApi.cs

@@ -37,7 +37,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Delete purchase order by ID
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Returns pet inventories by status
@@ -59,7 +59,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Dictionary&lt;string, int&gt;&gt;&gt;</returns>
-        Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Returns pet inventories by status
@@ -69,7 +69,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Dictionary&lt;string, int&gt;&gt;&gt;</returns>
-        Task<ApiResponse<Dictionary<string, int>>> GetInventoryOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Dictionary<string, int>>> GetInventoryOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find purchase order by ID
@@ -81,7 +81,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Order&gt;&gt;</returns>
-        Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find purchase order by ID
@@ -92,7 +92,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Order&gt;&gt;</returns>
-        Task<ApiResponse<Order>> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Place an order for a pet
@@ -104,7 +104,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Order&gt;&gt;</returns>
-        Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Place an order for a pet
@@ -115,7 +115,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Order&gt;&gt;</returns>
-        Task<ApiResponse<Order>> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -239,7 +239,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -258,7 +258,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -281,11 +281,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/order/{order_id}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -335,7 +335,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Dictionary&lt;string, int&gt;"/></returns>
-        public async Task<ApiResponse<Dictionary<string, int>>> GetInventoryOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Dictionary<string, int>>> GetInventoryOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -353,7 +353,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Dictionary&lt;string, int&gt;"/></returns>
-        public async Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -391,11 +391,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/inventory", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<Dictionary<string, int>> apiResponseLocalVar = new ApiResponse<Dictionary<string, int>>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -462,7 +462,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -481,7 +481,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -514,11 +514,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/order/{order_id}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<Order> apiResponseLocalVar = new ApiResponse<Order>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -581,7 +581,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -600,7 +600,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -646,11 +646,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/order", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<Order> apiResponseLocalVar = new ApiResponse<Order>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0/src/Org.OpenAPITools/Api/UserApi.cs

@@ -37,7 +37,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Create user
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -60,7 +60,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -71,7 +71,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -83,7 +83,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -94,7 +94,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Delete user
@@ -106,7 +106,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Delete user
@@ -117,7 +117,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Get user by user name
@@ -129,7 +129,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;User&gt;&gt;</returns>
-        Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Get user by user name
@@ -140,7 +140,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;User&gt;&gt;</returns>
-        Task<ApiResponse<User>> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<User>> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs user into the system
@@ -153,7 +153,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;string&gt;&gt;</returns>
-        Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs user into the system
@@ -165,7 +165,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;string&gt;&gt;</returns>
-        Task<ApiResponse<string>> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs out current logged in user session
@@ -176,7 +176,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs out current logged in user session
@@ -186,7 +186,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> LogoutUserOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> LogoutUserOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updated user
@@ -199,7 +199,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updated user
@@ -211,7 +211,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -335,7 +335,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -354,7 +354,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -390,11 +390,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -457,7 +457,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -476,7 +476,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -512,11 +512,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/createWithArray", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -579,7 +579,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -598,7 +598,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -634,11 +634,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/createWithList", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -701,7 +701,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -720,7 +720,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -743,11 +743,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/{username}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -810,7 +810,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="User"/></returns>
-        public async Task<ApiResponse<User>> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<User>> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -829,7 +829,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="User"/></returns>
-        public async Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -862,11 +862,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/{username}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<User> apiResponseLocalVar = new ApiResponse<User>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -936,7 +936,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -956,7 +956,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -998,11 +998,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/login", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<string> apiResponseLocalVar = new ApiResponse<string>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1052,7 +1052,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> LogoutUserOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> LogoutUserOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1070,7 +1070,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1093,11 +1093,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/logout", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 
@@ -1167,7 +1167,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1187,7 +1187,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1225,11 +1225,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/{username}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<object> apiResponseLocalVar = new ApiResponse<object>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs

@@ -94,7 +94,7 @@ namespace Org.OpenAPITools.Client
         /// <param name="request"></param>
         /// <param name="requestBody"></param>
         /// <param name="cancellationToken"></param>
-        internal Dictionary<string, string> GetHttpSignedHeader(System.Net.Http.HttpRequestMessage request, string requestBody, System.Threading.CancellationToken? cancellationToken = null)
+        internal Dictionary<string, string> GetHttpSignedHeader(System.Net.Http.HttpRequestMessage request, string requestBody, System.Threading.CancellationToken cancellationToken = default)
         {
             if (request.RequestUri == null)
                 throw new NullReferenceException("The request URI was null");

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0/src/Org.OpenAPITools/Client/HttpSigningToken.cs

@@ -30,7 +30,7 @@ namespace Org.OpenAPITools.Client
         /// <param name="request"></param>
         /// <param name="requestBody"></param>
         /// <param name="cancellationToken"></param>
-        public void UseInHeader(System.Net.Http.HttpRequestMessage request, string requestBody, CancellationToken? cancellationToken = null)
+        public void UseInHeader(System.Net.Http.HttpRequestMessage request, string requestBody, CancellationToken cancellationToken = default)
         {
             var signedHeaders = _configuration.GetHttpSignedHeader(request, requestBody, cancellationToken);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0/src/Org.OpenAPITools/Client/RateLimitProvider`1.cs

@@ -40,8 +40,7 @@ namespace Org.OpenAPITools.Client
             for (int i = 0; i < _tokens.Length; i++)
                 _tokens[i].TokenBecameAvailable += ((sender) => AvailableTokens.Writer.TryWrite((TTokenBase) sender));
         }
-
-        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null) 
-            => await AvailableTokens.Reader.ReadAsync(cancellation.GetValueOrDefault()).ConfigureAwait(false);
+        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default)
+            => await AvailableTokens.Reader.ReadAsync(cancellation).ConfigureAwait(false);
     }
 } 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-net6.0/src/Org.OpenAPITools/Client/TokenProvider`1.cs

@@ -25,7 +25,7 @@ namespace Org.OpenAPITools
         /// </summary>
         protected TTokenBase[] _tokens;
 
-        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null);
+        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default);
 
         /// <summary>
         /// Instantiates a TokenProvider.

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netcore-latest-allOf/src/Org.OpenAPITools/Api/DefaultApi.cs

@@ -39,7 +39,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="personId">The id of the person to retrieve</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Person&gt;&gt;</returns>
-        Task<ApiResponse<Person>> ListAsync(string personId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Person>> ListAsync(string personId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -50,7 +50,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="personId">The id of the person to retrieve</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Person&gt;?&gt;</returns>
-        Task<ApiResponse<Person>?> ListOrDefaultAsync(string personId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Person>?> ListOrDefaultAsync(string personId, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -139,7 +139,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="personId">The id of the person to retrieve</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Person"/></returns>
-        public async Task<ApiResponse<Person>?> ListOrDefaultAsync(string personId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Person>?> ListOrDefaultAsync(string personId, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -158,7 +158,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="personId">The id of the person to retrieve</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Person"/></returns>
-        public async Task<ApiResponse<Person>> ListAsync(string personId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Person>> ListAsync(string personId, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -190,11 +190,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/person/display/{personId}", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<Person> apiResponseLocalVar = new ApiResponse<Person>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netcore-latest-allOf/src/Org.OpenAPITools/Client/RateLimitProvider`1.cs

@@ -42,8 +42,7 @@ namespace Org.OpenAPITools.Client
             for (int i = 0; i < _tokens.Length; i++)
                 _tokens[i].TokenBecameAvailable += ((sender) => AvailableTokens.Writer.TryWrite((TTokenBase) sender));
         }
-
-        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null) 
-            => await AvailableTokens.Reader.ReadAsync(cancellation.GetValueOrDefault()).ConfigureAwait(false);
+        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default)
+            => await AvailableTokens.Reader.ReadAsync(cancellation).ConfigureAwait(false);
     }
 } 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netcore-latest-allOf/src/Org.OpenAPITools/Client/TokenProvider`1.cs

@@ -27,7 +27,7 @@ namespace Org.OpenAPITools
         /// </summary>
         protected TTokenBase[] _tokens;
 
-        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null);
+        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default);
 
         /// <summary>
         /// Instantiates a TokenProvider.

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netcore-latest-anyOf/src/Org.OpenAPITools/Api/DefaultApi.cs

@@ -38,7 +38,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Fruit&gt;&gt;</returns>
-        Task<ApiResponse<Fruit>> RootGetAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Fruit>> RootGetAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Fruit&gt;?&gt;</returns>
-        Task<ApiResponse<Fruit>?> RootGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Fruit>?> RootGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -124,7 +124,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Fruit"/></returns>
-        public async Task<ApiResponse<Fruit>?> RootGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Fruit>?> RootGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -142,7 +142,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Fruit"/></returns>
-        public async Task<ApiResponse<Fruit>> RootGetAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Fruit>> RootGetAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -174,11 +174,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<Fruit> apiResponseLocalVar = new ApiResponse<Fruit>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netcore-latest-anyOf/src/Org.OpenAPITools/Client/RateLimitProvider`1.cs

@@ -42,8 +42,7 @@ namespace Org.OpenAPITools.Client
             for (int i = 0; i < _tokens.Length; i++)
                 _tokens[i].TokenBecameAvailable += ((sender) => AvailableTokens.Writer.TryWrite((TTokenBase) sender));
         }
-
-        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null) 
-            => await AvailableTokens.Reader.ReadAsync(cancellation.GetValueOrDefault()).ConfigureAwait(false);
+        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default)
+            => await AvailableTokens.Reader.ReadAsync(cancellation).ConfigureAwait(false);
     }
 } 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netcore-latest-anyOf/src/Org.OpenAPITools/Client/TokenProvider`1.cs

@@ -27,7 +27,7 @@ namespace Org.OpenAPITools
         /// </summary>
         protected TTokenBase[] _tokens;
 
-        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null);
+        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default);
 
         /// <summary>
         /// Instantiates a TokenProvider.

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netcore-latest-oneOf/src/Org.OpenAPITools/Api/DefaultApi.cs

@@ -38,7 +38,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Fruit&gt;&gt;</returns>
-        Task<ApiResponse<Fruit>> RootGetAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Fruit>> RootGetAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Fruit&gt;?&gt;</returns>
-        Task<ApiResponse<Fruit>?> RootGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Fruit>?> RootGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -124,7 +124,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Fruit"/></returns>
-        public async Task<ApiResponse<Fruit>?> RootGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Fruit>?> RootGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -142,7 +142,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Fruit"/></returns>
-        public async Task<ApiResponse<Fruit>> RootGetAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Fruit>> RootGetAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -174,11 +174,11 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/", uriBuilderLocalVar.Path));
 
-                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken.GetValueOrDefault()).ConfigureAwait(false);
+                        string responseContentLocalVar = await httpResponseMessageLocalVar.Content.ReadAsStringAsync(cancellationToken).ConfigureAwait(false);
 
                         ApiResponse<Fruit> apiResponseLocalVar = new ApiResponse<Fruit>(httpRequestMessageLocalVar, httpResponseMessageLocalVar, responseContentLocalVar, _jsonSerializerOptions);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netcore-latest-oneOf/src/Org.OpenAPITools/Client/RateLimitProvider`1.cs

@@ -42,8 +42,7 @@ namespace Org.OpenAPITools.Client
             for (int i = 0; i < _tokens.Length; i++)
                 _tokens[i].TokenBecameAvailable += ((sender) => AvailableTokens.Writer.TryWrite((TTokenBase) sender));
         }
-
-        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null) 
-            => await AvailableTokens.Reader.ReadAsync(cancellation.GetValueOrDefault()).ConfigureAwait(false);
+        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default)
+            => await AvailableTokens.Reader.ReadAsync(cancellation).ConfigureAwait(false);
     }
 } 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netcore-latest-oneOf/src/Org.OpenAPITools/Client/TokenProvider`1.cs

@@ -27,7 +27,7 @@ namespace Org.OpenAPITools
         /// </summary>
         protected TTokenBase[] _tokens;
 
-        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null);
+        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default);
 
         /// <summary>
         /// Instantiates a TokenProvider.

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0/src/Org.OpenAPITools/Api/AnotherFakeApi.cs

@@ -37,7 +37,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test special tags
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -172,7 +172,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> Call123TestSpecialTagsOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -191,7 +191,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> Call123TestSpecialTagsAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -236,7 +236,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/another-fake/dummy", uriBuilderLocalVar.Path));
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0/src/Org.OpenAPITools/Api/DefaultApi.cs

@@ -36,7 +36,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;FooGetDefaultResponse&gt;&gt;</returns>
-        Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -46,7 +46,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;FooGetDefaultResponse&gt;&gt;</returns>
-        Task<ApiResponse<FooGetDefaultResponse>> FooGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<FooGetDefaultResponse>> FooGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -58,7 +58,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -69,7 +69,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Hello
@@ -80,7 +80,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;Guid&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Hello
@@ -90,7 +90,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;Guid&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Guid>>> HelloOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Guid>>> HelloOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -201,7 +201,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="FooGetDefaultResponse"/></returns>
-        public async Task<ApiResponse<FooGetDefaultResponse>> FooGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<FooGetDefaultResponse>> FooGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -219,7 +219,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="FooGetDefaultResponse"/></returns>
-        public async Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<FooGetDefaultResponse>> FooGetAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -251,7 +251,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/foo", uriBuilderLocalVar.Path));
 
@@ -318,7 +318,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> GetCountryOrDefaultAsync(string country, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -337,7 +337,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="country"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> GetCountryAsync(string country, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -379,7 +379,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/country", uriBuilderLocalVar.Path));
 
@@ -433,7 +433,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Guid&gt;"/></returns>
-        public async Task<ApiResponse<List<Guid>>> HelloOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Guid>>> HelloOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -451,7 +451,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Guid&gt;"/></returns>
-        public async Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Guid>>> HelloAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -483,7 +483,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/hello", uriBuilderLocalVar.Path));
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0/src/Org.OpenAPITools/Api/FakeApi.cs

@@ -36,7 +36,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;HealthCheckResult&gt;&gt;</returns>
-        Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Health check endpoint
@@ -46,7 +46,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;HealthCheckResult&gt;&gt;</returns>
-        Task<ApiResponse<HealthCheckResult>> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<HealthCheckResult>> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -58,7 +58,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;bool&gt;&gt;</returns>
-        Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -69,7 +69,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;bool&gt;&gt;</returns>
-        Task<ApiResponse<bool>> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<bool>> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -81,7 +81,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;OuterComposite&gt;&gt;</returns>
-        Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -92,7 +92,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;OuterComposite&gt;&gt;</returns>
-        Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -104,7 +104,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;decimal&gt;&gt;</returns>
-        Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -115,7 +115,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;decimal&gt;&gt;</returns>
-        Task<ApiResponse<decimal>> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<decimal>> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -128,7 +128,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;string&gt;&gt;</returns>
-        Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -140,7 +140,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;string&gt;&gt;</returns>
-        Task<ApiResponse<string>> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Array of Enums
@@ -151,7 +151,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;OuterEnum&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Array of Enums
@@ -161,7 +161,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;OuterEnum&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -173,7 +173,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -184,7 +184,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -197,7 +197,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -209,7 +209,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test \&quot;client\&quot; model
@@ -221,7 +221,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test \&quot;client\&quot; model
@@ -232,7 +232,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
@@ -257,7 +257,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint for testing various parameters 假端點 偽のエンドポイント 가짜 엔드 포인트 
@@ -281,7 +281,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test enum parameters
@@ -300,7 +300,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestEnumParametersAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestEnumParametersAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test enum parameters
@@ -318,7 +318,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestEnumParametersOrDefaultAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestEnumParametersOrDefaultAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint to test group parameters (optional)
@@ -335,7 +335,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Fake endpoint to test group parameters (optional)
@@ -351,7 +351,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test inline additionalProperties
@@ -363,7 +363,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test inline additionalProperties
@@ -374,7 +374,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test json serialization of form data
@@ -387,7 +387,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// test json serialization of form data
@@ -399,7 +399,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -415,7 +415,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// 
@@ -430,7 +430,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -541,7 +541,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="HealthCheckResult"/></returns>
-        public async Task<ApiResponse<HealthCheckResult>> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<HealthCheckResult>> FakeHealthGetOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -559,7 +559,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="HealthCheckResult"/></returns>
-        public async Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<HealthCheckResult>> FakeHealthGetAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -591,7 +591,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/health", uriBuilderLocalVar.Path));
 
@@ -649,7 +649,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="bool"/></returns>
-        public async Task<ApiResponse<bool>> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<bool>> FakeOuterBooleanSerializeOrDefaultAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -668,7 +668,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input boolean as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="bool"/></returns>
-        public async Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<bool>> FakeOuterBooleanSerializeAsync(bool? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -713,7 +713,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/boolean", uriBuilderLocalVar.Path));
 
@@ -771,7 +771,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="OuterComposite"/></returns>
-        public async Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeOrDefaultAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -790,7 +790,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="outerComposite">Input composite as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="OuterComposite"/></returns>
-        public async Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<OuterComposite>> FakeOuterCompositeSerializeAsync(OuterComposite outerComposite = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -835,7 +835,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/composite", uriBuilderLocalVar.Path));
 
@@ -893,7 +893,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="decimal"/></returns>
-        public async Task<ApiResponse<decimal>> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<decimal>> FakeOuterNumberSerializeOrDefaultAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -912,7 +912,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input number as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="decimal"/></returns>
-        public async Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<decimal>> FakeOuterNumberSerializeAsync(decimal? body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -957,7 +957,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/number", uriBuilderLocalVar.Path));
 
@@ -1028,7 +1028,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>> FakeOuterStringSerializeOrDefaultAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1048,7 +1048,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="body">Input string as post body (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>> FakeOuterStringSerializeAsync(Guid requiredStringUuid, string body = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1101,7 +1101,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/outer/string", uriBuilderLocalVar.Path));
 
@@ -1155,7 +1155,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;OuterEnum&gt;"/></returns>
-        public async Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1173,7 +1173,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;OuterEnum&gt;"/></returns>
-        public async Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<OuterEnum>>> GetArrayOfEnumsAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1205,7 +1205,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/array-of-enums", uriBuilderLocalVar.Path));
 
@@ -1272,7 +1272,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestBodyWithFileSchemaOrDefaultAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1291,7 +1291,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="fileSchemaTestClass"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestBodyWithFileSchemaAsync(FileSchemaTestClass fileSchemaTestClass, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1327,7 +1327,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/body-with-file-schema", uriBuilderLocalVar.Path));
 
@@ -1401,7 +1401,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestBodyWithQueryParamsOrDefaultAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1421,7 +1421,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="query"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestBodyWithQueryParamsAsync(User user, string query, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1465,7 +1465,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/body-with-query-params", uriBuilderLocalVar.Path));
 
@@ -1532,7 +1532,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> TestClientModelOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1551,7 +1551,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> TestClientModelAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1596,7 +1596,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
@@ -1724,7 +1724,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestEndpointParametersOrDefaultAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1756,7 +1756,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="dateTime">None (optional, default to &quot;2010-02-01T10:20:10.111110+01:00&quot;)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestEndpointParametersAsync(byte[] _byte, decimal number, double _double, string patternWithoutDelimiter, DateTime? date = null, System.IO.Stream binary = null, float? _float = null, int? integer = null, int? int32 = null, long? int64 = null, string _string = null, string password = null, string callback = null, DateTime? dateTime = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1862,7 +1862,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
@@ -1952,7 +1952,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestEnumParametersOrDefaultAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestEnumParametersOrDefaultAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1978,7 +1978,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="enumFormString">Form parameter enum test (string) (optional, default to -efg)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestEnumParametersAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestEnumParametersAsync(List<string> enumHeaderStringArray = null, List<string> enumQueryStringArray = null, double? enumQueryDouble = null, int? enumQueryInteger = null, List<string> enumFormStringArray = null, string enumHeaderString = null, string enumQueryString = null, string enumFormString = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2051,7 +2051,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
@@ -2144,7 +2144,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestGroupParametersOrDefaultAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2168,7 +2168,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="int64Group">Integer in group parameters (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestGroupParametersAsync(bool requiredBooleanGroup, int requiredStringGroup, long requiredInt64Group, bool? booleanGroup = null, int? stringGroup = null, long? int64Group = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2223,7 +2223,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake", uriBuilderLocalVar.Path));
 
@@ -2294,7 +2294,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestInlineAdditionalPropertiesOrDefaultAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2313,7 +2313,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="requestBody">request body</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestInlineAdditionalPropertiesAsync(Dictionary<string, string> requestBody, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2349,7 +2349,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/inline-additionalProperties", uriBuilderLocalVar.Path));
 
@@ -2423,7 +2423,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestJsonFormDataOrDefaultAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2443,7 +2443,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="param2">field2</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestJsonFormDataAsync(string param, string param2, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2491,7 +2491,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/jsonFormData", uriBuilderLocalVar.Path));
 
@@ -2586,7 +2586,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestQueryParameterCollectionFormatOrDefaultAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -2609,7 +2609,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="context"></param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> TestQueryParameterCollectionFormatAsync(List<string> pipe, List<string> ioutil, List<string> http, List<string> url, List<string> context, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -2647,7 +2647,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/test-query-parameters", uriBuilderLocalVar.Path));
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs

@@ -37,7 +37,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// To test class name in snake case
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ModelClient&gt;&gt;</returns>
-        Task<ApiResponse<ModelClient>> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ModelClient>> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -172,7 +172,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> TestClassnameOrDefaultAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -191,7 +191,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="modelClient">client model</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ModelClient"/></returns>
-        public async Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ModelClient>> TestClassnameAsync(ModelClient modelClient, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -246,7 +246,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake_classname_test", uriBuilderLocalVar.Path));
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0/src/Org.OpenAPITools/Api/PetApi.cs

@@ -37,7 +37,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Add a new pet to the store
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Deletes a pet
@@ -61,7 +61,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeletePetAsync(long petId, string apiKey = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeletePetAsync(long petId, string apiKey = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Deletes a pet
@@ -73,7 +73,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeletePetOrDefaultAsync(long petId, string apiKey = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeletePetOrDefaultAsync(long petId, string apiKey = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by status
@@ -85,7 +85,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;Pet&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by status
@@ -96,7 +96,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;Pet&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Pet>>> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by tags
@@ -108,7 +108,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;List&lt;Pet&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Finds Pets by tags
@@ -119,7 +119,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;List&lt;Pet&gt;&gt;&gt;</returns>
-        Task<ApiResponse<List<Pet>>> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<List<Pet>>> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find pet by ID
@@ -131,7 +131,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Pet&gt;&gt;</returns>
-        Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find pet by ID
@@ -142,7 +142,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Pet&gt;&gt;</returns>
-        Task<ApiResponse<Pet>> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Pet>> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Update an existing pet
@@ -154,7 +154,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Update an existing pet
@@ -165,7 +165,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updates a pet in the store with form data
@@ -179,7 +179,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updates a pet in the store with form data
@@ -192,7 +192,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdatePetWithFormOrDefaultAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdatePetWithFormOrDefaultAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image
@@ -206,7 +206,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ApiResponse&gt;&gt;</returns>
-        Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image
@@ -219,7 +219,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ApiResponse&gt;&gt;</returns>
-        Task<ApiResponse<ApiResponse>> UploadFileOrDefaultAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>> UploadFileOrDefaultAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image (required)
@@ -233,7 +233,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;ApiResponse&gt;&gt;</returns>
-        Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// uploads an image (required)
@@ -246,7 +246,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;ApiResponse&gt;&gt;</returns>
-        Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -370,7 +370,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> AddPetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -389,7 +389,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> AddPetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -442,7 +442,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet", uriBuilderLocalVar.Path));
 
@@ -521,7 +521,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeletePetOrDefaultAsync(long petId, string apiKey = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeletePetOrDefaultAsync(long petId, string apiKey = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -541,7 +541,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="apiKey"> (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeletePetAsync(long petId, string apiKey = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeletePetAsync(long petId, string apiKey = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -577,7 +577,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}", uriBuilderLocalVar.Path));
 
@@ -648,7 +648,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>> FindPetsByStatusOrDefaultAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -667,7 +667,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Status values that need to be considered for filter</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>> FindPetsByStatusAsync(List<string> status, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -722,7 +722,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/findByStatus", uriBuilderLocalVar.Path));
 
@@ -797,7 +797,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>> FindPetsByTagsOrDefaultAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -816,7 +816,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="tags">Tags to filter by</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="List&lt;Pet&gt;"/></returns>
-        public async Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<List<Pet>>> FindPetsByTagsAsync(List<string> tags, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -871,7 +871,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/findByTags", uriBuilderLocalVar.Path));
 
@@ -946,7 +946,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Pet"/></returns>
-        public async Task<ApiResponse<Pet>> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Pet>> GetPetByIdOrDefaultAsync(long petId, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -965,7 +965,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="petId">ID of pet to return</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Pet"/></returns>
-        public async Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Pet>> GetPetByIdAsync(long petId, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1004,7 +1004,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}", uriBuilderLocalVar.Path));
 
@@ -1075,7 +1075,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdatePetOrDefaultAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1094,7 +1094,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="pet">Pet object that needs to be added to the store</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdatePetAsync(Pet pet, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1147,7 +1147,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet", uriBuilderLocalVar.Path));
 
@@ -1230,7 +1230,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdatePetWithFormOrDefaultAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdatePetWithFormOrDefaultAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1251,7 +1251,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="status">Updated status of the pet (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdatePetWithFormAsync(long petId, string name = null, string status = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1306,7 +1306,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}", uriBuilderLocalVar.Path));
 
@@ -1385,7 +1385,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>> UploadFileOrDefaultAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>> UploadFileOrDefaultAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1406,7 +1406,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>> UploadFileAsync(long petId, System.IO.Stream file = null, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1470,7 +1470,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/pet/{petId}/uploadImage", uriBuilderLocalVar.Path));
 
@@ -1552,7 +1552,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileOrDefaultAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1573,7 +1573,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="additionalMetadata">Additional data to pass to server (optional)</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="ApiResponse"/></returns>
-        public async Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<ApiResponse>> UploadFileWithRequiredFileAsync(System.IO.Stream requiredFile, long petId, string additionalMetadata = null, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1637,7 +1637,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/fake/{petId}/uploadImageWithRequiredFile", uriBuilderLocalVar.Path));
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0/src/Org.OpenAPITools/Api/StoreApi.cs

@@ -37,7 +37,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Delete purchase order by ID
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Returns pet inventories by status
@@ -59,7 +59,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Dictionary&lt;string, int&gt;&gt;&gt;</returns>
-        Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Returns pet inventories by status
@@ -69,7 +69,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Dictionary&lt;string, int&gt;&gt;&gt;</returns>
-        Task<ApiResponse<Dictionary<string, int>>> GetInventoryOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Dictionary<string, int>>> GetInventoryOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find purchase order by ID
@@ -81,7 +81,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Order&gt;&gt;</returns>
-        Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Find purchase order by ID
@@ -92,7 +92,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Order&gt;&gt;</returns>
-        Task<ApiResponse<Order>> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Place an order for a pet
@@ -104,7 +104,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;Order&gt;&gt;</returns>
-        Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Place an order for a pet
@@ -115,7 +115,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;Order&gt;&gt;</returns>
-        Task<ApiResponse<Order>> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<Order>> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -239,7 +239,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeleteOrderOrDefaultAsync(string orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -258,7 +258,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of the order that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeleteOrderAsync(string orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -281,7 +281,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/order/{order_id}", uriBuilderLocalVar.Path));
 
@@ -335,7 +335,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Dictionary&lt;string, int&gt;"/></returns>
-        public async Task<ApiResponse<Dictionary<string, int>>> GetInventoryOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Dictionary<string, int>>> GetInventoryOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -353,7 +353,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Dictionary&lt;string, int&gt;"/></returns>
-        public async Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Dictionary<string, int>>> GetInventoryAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -391,7 +391,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/inventory", uriBuilderLocalVar.Path));
 
@@ -462,7 +462,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>> GetOrderByIdOrDefaultAsync(long orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -481,7 +481,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="orderId">ID of pet that needs to be fetched</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>> GetOrderByIdAsync(long orderId, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -514,7 +514,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/order/{order_id}", uriBuilderLocalVar.Path));
 
@@ -581,7 +581,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>> PlaceOrderOrDefaultAsync(Order order, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -600,7 +600,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="order">order placed for purchasing the pet</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="Order"/></returns>
-        public async Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<Order>> PlaceOrderAsync(Order order, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -646,7 +646,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/store/order", uriBuilderLocalVar.Path));
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0/src/Org.OpenAPITools/Api/UserApi.cs

@@ -37,7 +37,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Create user
@@ -48,7 +48,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -60,7 +60,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -71,7 +71,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -83,7 +83,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Creates list of users with given input array
@@ -94,7 +94,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Delete user
@@ -106,7 +106,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Delete user
@@ -117,7 +117,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Get user by user name
@@ -129,7 +129,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;User&gt;&gt;</returns>
-        Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Get user by user name
@@ -140,7 +140,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;User&gt;&gt;</returns>
-        Task<ApiResponse<User>> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<User>> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs user into the system
@@ -153,7 +153,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;string&gt;&gt;</returns>
-        Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs user into the system
@@ -165,7 +165,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;string&gt;&gt;</returns>
-        Task<ApiResponse<string>> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<string>> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs out current logged in user session
@@ -176,7 +176,7 @@ namespace Org.OpenAPITools.IApi
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Logs out current logged in user session
@@ -186,7 +186,7 @@ namespace Org.OpenAPITools.IApi
         /// </remarks>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> LogoutUserOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> LogoutUserOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updated user
@@ -199,7 +199,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&lt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default);
 
         /// <summary>
         /// Updated user
@@ -211,7 +211,7 @@ namespace Org.OpenAPITools.IApi
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns>Task&lt;ApiResponse&gt;object&gt;&gt;</returns>
-        Task<ApiResponse<object>> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null);
+        Task<ApiResponse<object>> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default);
     }
 }
 
@@ -335,7 +335,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUserOrDefaultAsync(User user, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -354,7 +354,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">Created user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUserAsync(User user, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -390,7 +390,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user", uriBuilderLocalVar.Path));
 
@@ -457,7 +457,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUsersWithArrayInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -476,7 +476,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUsersWithArrayInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -512,7 +512,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/createWithArray", uriBuilderLocalVar.Path));
 
@@ -579,7 +579,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUsersWithListInputOrDefaultAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -598,7 +598,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="user">List of user object</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> CreateUsersWithListInputAsync(List<User> user, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -634,7 +634,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/createWithList", uriBuilderLocalVar.Path));
 
@@ -701,7 +701,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeleteUserOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -720,7 +720,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> DeleteUserAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -743,7 +743,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/{username}", uriBuilderLocalVar.Path));
 
@@ -810,7 +810,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="User"/></returns>
-        public async Task<ApiResponse<User>> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<User>> GetUserByNameOrDefaultAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -829,7 +829,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">The name that needs to be fetched. Use user1 for testing.</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="User"/></returns>
-        public async Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<User>> GetUserByNameAsync(string username, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -862,7 +862,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/{username}", uriBuilderLocalVar.Path));
 
@@ -936,7 +936,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>> LoginUserOrDefaultAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -956,7 +956,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="password">The password for login in clear text</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="string"/></returns>
-        public async Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<string>> LoginUserAsync(string username, string password, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -998,7 +998,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/login", uriBuilderLocalVar.Path));
 
@@ -1052,7 +1052,7 @@ namespace Org.OpenAPITools.Api
         /// </summary>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> LogoutUserOrDefaultAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> LogoutUserOrDefaultAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1070,7 +1070,7 @@ namespace Org.OpenAPITools.Api
         /// <exception cref="ApiException">Thrown when fails to make API call</exception>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> LogoutUserAsync(System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1093,7 +1093,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/logout", uriBuilderLocalVar.Path));
 
@@ -1167,7 +1167,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdateUserOrDefaultAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default)
         {
             try
             {
@@ -1187,7 +1187,7 @@ namespace Org.OpenAPITools.Api
         /// <param name="username">name that need to be deleted</param>
         /// <param name="cancellationToken">Cancellation Token to cancel the request.</param>
         /// <returns><see cref="Task"/>&lt;<see cref="ApiResponse{T}"/>&gt; where T : <see cref="object"/></returns>
-        public async Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken? cancellationToken = null)
+        public async Task<ApiResponse<object>> UpdateUserAsync(User user, string username, System.Threading.CancellationToken cancellationToken = default)
         {
             UriBuilder uriBuilderLocalVar = new UriBuilder();
 
@@ -1225,7 +1225,7 @@ namespace Org.OpenAPITools.Api
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
-                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken.GetValueOrDefault()).ConfigureAwait(false))
+                    using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         OnApiResponded(new ApiResponseEventArgs(requestedAtLocalVar, DateTime.UtcNow, httpResponseMessageLocalVar.StatusCode, "/user/{username}", uriBuilderLocalVar.Path));
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0/src/Org.OpenAPITools/Client/HttpSigningConfiguration.cs

@@ -94,7 +94,7 @@ namespace Org.OpenAPITools.Client
         /// <param name="request"></param>
         /// <param name="requestBody"></param>
         /// <param name="cancellationToken"></param>
-        internal Dictionary<string, string> GetHttpSignedHeader(System.Net.Http.HttpRequestMessage request, string requestBody, System.Threading.CancellationToken? cancellationToken = null)
+        internal Dictionary<string, string> GetHttpSignedHeader(System.Net.Http.HttpRequestMessage request, string requestBody, System.Threading.CancellationToken cancellationToken = default)
         {
             if (request.RequestUri == null)
                 throw new NullReferenceException("The request URI was null");

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0/src/Org.OpenAPITools/Client/HttpSigningToken.cs

@@ -30,7 +30,7 @@ namespace Org.OpenAPITools.Client
         /// <param name="request"></param>
         /// <param name="requestBody"></param>
         /// <param name="cancellationToken"></param>
-        public void UseInHeader(System.Net.Http.HttpRequestMessage request, string requestBody, CancellationToken? cancellationToken = null)
+        public void UseInHeader(System.Net.Http.HttpRequestMessage request, string requestBody, CancellationToken cancellationToken = default)
         {
             var signedHeaders = _configuration.GetHttpSignedHeader(request, requestBody, cancellationToken);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0/src/Org.OpenAPITools/Client/RateLimitProvider`1.cs

@@ -47,7 +47,7 @@ namespace Org.OpenAPITools.Client
             }
         }
 
-        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null)
+        internal override async System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default)
         {
             await _semaphore.WaitAsync().ConfigureAwait(false);
 

samples/client/petstore/csharp-netcore/OpenAPIClient-generichost-netstandard2.0/src/Org.OpenAPITools/Client/TokenProvider`1.cs

@@ -25,7 +25,7 @@ namespace Org.OpenAPITools
         /// </summary>
         protected TTokenBase[] _tokens;
 
-        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken? cancellation = null);
+        internal abstract System.Threading.Tasks.ValueTask<TTokenBase> GetAsync(System.Threading.CancellationToken cancellation = default);
 
         /// <summary>
         /// Instantiates a TokenProvider.