diff --git a/modules/openapi-generator/src/main/resources/csharp/ApiClient.mustache b/modules/openapi-generator/src/main/resources/csharp/ApiClient.mustache
index eb5be40d3ae..0d826c87c9d 100644
--- a/modules/openapi-generator/src/main/resources/csharp/ApiClient.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/ApiClient.mustache
@@ -474,6 +474,7 @@ namespace {{packageName}}.Client
                     configuration.OAuthTokenUrl,
                     configuration.OAuthClientId,
                     configuration.OAuthClientSecret,
+                    configuration.OAuthScope,
                     configuration.OAuthFlow,
                     SerializerSettings,
                     configuration);
diff --git a/modules/openapi-generator/src/main/resources/csharp/Configuration.mustache b/modules/openapi-generator/src/main/resources/csharp/Configuration.mustache
index a765ebf138d..71ff47f971d 100644
--- a/modules/openapi-generator/src/main/resources/csharp/Configuration.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/Configuration.mustache
@@ -366,6 +366,12 @@ namespace {{packageName}}.Client
         /// <value>The OAuth Client Secret.</value>
         public virtual string OAuthClientSecret { get; set; }
 
+        /// <summary>
+        /// Gets or sets the client scope for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Client Scope.</value>
+        public virtual string{{nrt?}} OAuthScope { get; set; }
+
         /// <summary>
         /// Gets or sets the flow for OAuth2 authentication.
         /// </summary>
@@ -711,6 +717,7 @@ namespace {{packageName}}.Client
                 OAuthTokenUrl = second.OAuthTokenUrl ?? first.OAuthTokenUrl,
                 OAuthClientId = second.OAuthClientId ?? first.OAuthClientId,
                 OAuthClientSecret = second.OAuthClientSecret ?? first.OAuthClientSecret,
+                OAuthScope = second.OAuthScope ?? first.OAuthScope,
                 OAuthFlow = second.OAuthFlow ?? first.OAuthFlow,
                 {{/hasOAuthMethods}}
                 {{/useRestSharp}}
diff --git a/modules/openapi-generator/src/main/resources/csharp/IReadableConfiguration.mustache b/modules/openapi-generator/src/main/resources/csharp/IReadableConfiguration.mustache
index 78c998b3458..5981728b466 100644
--- a/modules/openapi-generator/src/main/resources/csharp/IReadableConfiguration.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/IReadableConfiguration.mustache
@@ -43,6 +43,12 @@ namespace {{packageName}}.Client
         /// <value>OAuth Client Secret.</value>
         string OAuthClientSecret { get; }
 
+        /// <summary>
+        /// Gets the OAuth token scope.
+        /// </summary>
+        /// <value>OAuth Token scope.</value>
+        string{{nrt?}} OAuthScope { get; }
+
         /// <summary>
         /// Gets the OAuth flow.
         /// </summary>
diff --git a/modules/openapi-generator/src/main/resources/csharp/auth/OAuthAuthenticator.mustache b/modules/openapi-generator/src/main/resources/csharp/auth/OAuthAuthenticator.mustache
index ae8f3c75391..d71f262a810 100644
--- a/modules/openapi-generator/src/main/resources/csharp/auth/OAuthAuthenticator.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/auth/OAuthAuthenticator.mustache
@@ -16,6 +16,7 @@ namespace {{packageName}}.Client.Auth
         readonly string _tokenUrl;
         readonly string _clientId;
         readonly string _clientSecret;
+        readonly string{{nrt?}} _scope;
         readonly string _grantType;
         readonly JsonSerializerSettings _serializerSettings;
         readonly IReadableConfiguration _configuration;
@@ -27,6 +28,7 @@ namespace {{packageName}}.Client.Auth
             string tokenUrl,
             string clientId,
             string clientSecret,
+            string{{nrt?}} scope,
             OAuthFlow? flow,
             JsonSerializerSettings serializerSettings,
             IReadableConfiguration configuration) : base("")
@@ -34,6 +36,7 @@ namespace {{packageName}}.Client.Auth
             _tokenUrl = tokenUrl;
             _clientId = clientId;
             _clientSecret = clientSecret;
+            _scope = scope;
             _serializerSettings = serializerSettings;
             _configuration = configuration;
 
@@ -80,6 +83,12 @@ namespace {{packageName}}.Client.Auth
                 .AddParameter("grant_type", _grantType)
                 .AddParameter("client_id", _clientId)
                 .AddParameter("client_secret", _clientSecret);
+
+            if (!string.IsNullOrEmpty(_scope))
+            {
+                request.AddParameter("scope", _scope);
+            }
+
             var response = await client.PostAsync<TokenResponse>(request).ConfigureAwait(false);
             
             // RFC6749 - token_type is case insensitive.
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/ApiClient.cs b/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/ApiClient.cs
index 7f9fc8d8a17..7d3e7d96adf 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/ApiClient.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/ApiClient.cs
@@ -474,6 +474,7 @@ namespace Org.OpenAPITools.Client
                     configuration.OAuthTokenUrl,
                     configuration.OAuthClientId,
                     configuration.OAuthClientSecret,
+                    configuration.OAuthScope,
                     configuration.OAuthFlow,
                     SerializerSettings,
                     configuration);
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs b/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
index b0da60f1df6..516b93d2f6a 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
@@ -24,6 +24,7 @@ namespace Org.OpenAPITools.Client.Auth
         readonly string _tokenUrl;
         readonly string _clientId;
         readonly string _clientSecret;
+        readonly string _scope;
         readonly string _grantType;
         readonly JsonSerializerSettings _serializerSettings;
         readonly IReadableConfiguration _configuration;
@@ -35,6 +36,7 @@ namespace Org.OpenAPITools.Client.Auth
             string tokenUrl,
             string clientId,
             string clientSecret,
+            string scope,
             OAuthFlow? flow,
             JsonSerializerSettings serializerSettings,
             IReadableConfiguration configuration) : base("")
@@ -42,6 +44,7 @@ namespace Org.OpenAPITools.Client.Auth
             _tokenUrl = tokenUrl;
             _clientId = clientId;
             _clientSecret = clientSecret;
+            _scope = scope;
             _serializerSettings = serializerSettings;
             _configuration = configuration;
 
@@ -88,6 +91,12 @@ namespace Org.OpenAPITools.Client.Auth
                 .AddParameter("grant_type", _grantType)
                 .AddParameter("client_id", _clientId)
                 .AddParameter("client_secret", _clientSecret);
+
+            if (!string.IsNullOrEmpty(_scope))
+            {
+                request.AddParameter("scope", _scope);
+            }
+
             var response = await client.PostAsync<TokenResponse>(request).ConfigureAwait(false);
             
             // RFC6749 - token_type is case insensitive.
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/Configuration.cs b/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/Configuration.cs
index b79f1a1a38c..26df7661dd5 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/Configuration.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/Configuration.cs
@@ -294,6 +294,12 @@ namespace Org.OpenAPITools.Client
         /// <value>The OAuth Client Secret.</value>
         public virtual string OAuthClientSecret { get; set; }
 
+        /// <summary>
+        /// Gets or sets the client scope for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Client Scope.</value>
+        public virtual string OAuthScope { get; set; }
+
         /// <summary>
         /// Gets or sets the flow for OAuth2 authentication.
         /// </summary>
@@ -622,6 +628,7 @@ namespace Org.OpenAPITools.Client
                 OAuthTokenUrl = second.OAuthTokenUrl ?? first.OAuthTokenUrl,
                 OAuthClientId = second.OAuthClientId ?? first.OAuthClientId,
                 OAuthClientSecret = second.OAuthClientSecret ?? first.OAuthClientSecret,
+                OAuthScope = second.OAuthScope ?? first.OAuthScope,
                 OAuthFlow = second.OAuthFlow ?? first.OAuthFlow,
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
                 DateTimeFormat = second.DateTimeFormat ?? first.DateTimeFormat,
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/IReadableConfiguration.cs b/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
index cc6fc6c592c..063daeb1b56 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.7/MultipleFrameworks/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
@@ -46,6 +46,12 @@ namespace Org.OpenAPITools.Client
         /// <value>OAuth Client Secret.</value>
         string OAuthClientSecret { get; }
 
+        /// <summary>
+        /// Gets the OAuth token scope.
+        /// </summary>
+        /// <value>OAuth Token scope.</value>
+        string OAuthScope { get; }
+
         /// <summary>
         /// Gets the OAuth flow.
         /// </summary>
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
index 0ad9a7e2d52..a55d7f34afc 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
@@ -474,6 +474,7 @@ namespace Org.OpenAPITools.Client
                     configuration.OAuthTokenUrl,
                     configuration.OAuthClientId,
                     configuration.OAuthClientSecret,
+                    configuration.OAuthScope,
                     configuration.OAuthFlow,
                     SerializerSettings,
                     configuration);
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
index f900e716ae8..d7fb1293b34 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
@@ -24,6 +24,7 @@ namespace Org.OpenAPITools.Client.Auth
         readonly string _tokenUrl;
         readonly string _clientId;
         readonly string _clientSecret;
+        readonly string _scope;
         readonly string _grantType;
         readonly JsonSerializerSettings _serializerSettings;
         readonly IReadableConfiguration _configuration;
@@ -35,6 +36,7 @@ namespace Org.OpenAPITools.Client.Auth
             string tokenUrl,
             string clientId,
             string clientSecret,
+            string scope,
             OAuthFlow? flow,
             JsonSerializerSettings serializerSettings,
             IReadableConfiguration configuration) : base("")
@@ -42,6 +44,7 @@ namespace Org.OpenAPITools.Client.Auth
             _tokenUrl = tokenUrl;
             _clientId = clientId;
             _clientSecret = clientSecret;
+            _scope = scope;
             _serializerSettings = serializerSettings;
             _configuration = configuration;
 
@@ -88,6 +91,12 @@ namespace Org.OpenAPITools.Client.Auth
                 .AddParameter("grant_type", _grantType)
                 .AddParameter("client_id", _clientId)
                 .AddParameter("client_secret", _clientSecret);
+
+            if (!string.IsNullOrEmpty(_scope))
+            {
+                request.AddParameter("scope", _scope);
+            }
+
             var response = await client.PostAsync<TokenResponse>(request).ConfigureAwait(false);
             
             // RFC6749 - token_type is case insensitive.
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/Configuration.cs b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
index f27abb3d78b..b213df44c00 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
@@ -399,6 +399,12 @@ namespace Org.OpenAPITools.Client
         /// <value>The OAuth Client Secret.</value>
         public virtual string OAuthClientSecret { get; set; }
 
+        /// <summary>
+        /// Gets or sets the client scope for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Client Scope.</value>
+        public virtual string OAuthScope { get; set; }
+
         /// <summary>
         /// Gets or sets the flow for OAuth2 authentication.
         /// </summary>
@@ -736,6 +742,7 @@ namespace Org.OpenAPITools.Client
                 OAuthTokenUrl = second.OAuthTokenUrl ?? first.OAuthTokenUrl,
                 OAuthClientId = second.OAuthClientId ?? first.OAuthClientId,
                 OAuthClientSecret = second.OAuthClientSecret ?? first.OAuthClientSecret,
+                OAuthScope = second.OAuthScope ?? first.OAuthScope,
                 OAuthFlow = second.OAuthFlow ?? first.OAuthFlow,
                 HttpSigningConfiguration = second.HttpSigningConfiguration ?? first.HttpSigningConfiguration,
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
diff --git a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
index 90ec4a6f193..8713a816f35 100644
--- a/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.7/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
@@ -46,6 +46,12 @@ namespace Org.OpenAPITools.Client
         /// <value>OAuth Client Secret.</value>
         string OAuthClientSecret { get; }
 
+        /// <summary>
+        /// Gets the OAuth token scope.
+        /// </summary>
+        /// <value>OAuth Token scope.</value>
+        string OAuthScope { get; }
+
         /// <summary>
         /// Gets the OAuth flow.
         /// </summary>
diff --git a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
index 0ad9a7e2d52..a55d7f34afc 100644
--- a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
@@ -474,6 +474,7 @@ namespace Org.OpenAPITools.Client
                     configuration.OAuthTokenUrl,
                     configuration.OAuthClientId,
                     configuration.OAuthClientSecret,
+                    configuration.OAuthScope,
                     configuration.OAuthFlow,
                     SerializerSettings,
                     configuration);
diff --git a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
index f900e716ae8..d7fb1293b34 100644
--- a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
@@ -24,6 +24,7 @@ namespace Org.OpenAPITools.Client.Auth
         readonly string _tokenUrl;
         readonly string _clientId;
         readonly string _clientSecret;
+        readonly string _scope;
         readonly string _grantType;
         readonly JsonSerializerSettings _serializerSettings;
         readonly IReadableConfiguration _configuration;
@@ -35,6 +36,7 @@ namespace Org.OpenAPITools.Client.Auth
             string tokenUrl,
             string clientId,
             string clientSecret,
+            string scope,
             OAuthFlow? flow,
             JsonSerializerSettings serializerSettings,
             IReadableConfiguration configuration) : base("")
@@ -42,6 +44,7 @@ namespace Org.OpenAPITools.Client.Auth
             _tokenUrl = tokenUrl;
             _clientId = clientId;
             _clientSecret = clientSecret;
+            _scope = scope;
             _serializerSettings = serializerSettings;
             _configuration = configuration;
 
@@ -88,6 +91,12 @@ namespace Org.OpenAPITools.Client.Auth
                 .AddParameter("grant_type", _grantType)
                 .AddParameter("client_id", _clientId)
                 .AddParameter("client_secret", _clientSecret);
+
+            if (!string.IsNullOrEmpty(_scope))
+            {
+                request.AddParameter("scope", _scope);
+            }
+
             var response = await client.PostAsync<TokenResponse>(request).ConfigureAwait(false);
             
             // RFC6749 - token_type is case insensitive.
diff --git a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/Configuration.cs b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
index f27abb3d78b..b213df44c00 100644
--- a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
@@ -399,6 +399,12 @@ namespace Org.OpenAPITools.Client
         /// <value>The OAuth Client Secret.</value>
         public virtual string OAuthClientSecret { get; set; }
 
+        /// <summary>
+        /// Gets or sets the client scope for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Client Scope.</value>
+        public virtual string OAuthScope { get; set; }
+
         /// <summary>
         /// Gets or sets the flow for OAuth2 authentication.
         /// </summary>
@@ -736,6 +742,7 @@ namespace Org.OpenAPITools.Client
                 OAuthTokenUrl = second.OAuthTokenUrl ?? first.OAuthTokenUrl,
                 OAuthClientId = second.OAuthClientId ?? first.OAuthClientId,
                 OAuthClientSecret = second.OAuthClientSecret ?? first.OAuthClientSecret,
+                OAuthScope = second.OAuthScope ?? first.OAuthScope,
                 OAuthFlow = second.OAuthFlow ?? first.OAuthFlow,
                 HttpSigningConfiguration = second.HttpSigningConfiguration ?? first.HttpSigningConfiguration,
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
diff --git a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
index 90ec4a6f193..8713a816f35 100644
--- a/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/net4.8/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
@@ -46,6 +46,12 @@ namespace Org.OpenAPITools.Client
         /// <value>OAuth Client Secret.</value>
         string OAuthClientSecret { get; }
 
+        /// <summary>
+        /// Gets the OAuth token scope.
+        /// </summary>
+        /// <value>OAuth Token scope.</value>
+        string OAuthScope { get; }
+
         /// <summary>
         /// Gets the OAuth flow.
         /// </summary>
diff --git a/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/ApiClient.cs b/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/ApiClient.cs
index 69279ed569c..05e2ddb4de8 100644
--- a/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/ApiClient.cs
+++ b/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/ApiClient.cs
@@ -473,6 +473,7 @@ namespace Org.OpenAPITools.Client
                     configuration.OAuthTokenUrl,
                     configuration.OAuthClientId,
                     configuration.OAuthClientSecret,
+                    configuration.OAuthScope,
                     configuration.OAuthFlow,
                     SerializerSettings,
                     configuration);
diff --git a/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs b/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
index f900e716ae8..ce6261390c3 100644
--- a/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
+++ b/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
@@ -24,6 +24,7 @@ namespace Org.OpenAPITools.Client.Auth
         readonly string _tokenUrl;
         readonly string _clientId;
         readonly string _clientSecret;
+        readonly string? _scope;
         readonly string _grantType;
         readonly JsonSerializerSettings _serializerSettings;
         readonly IReadableConfiguration _configuration;
@@ -35,6 +36,7 @@ namespace Org.OpenAPITools.Client.Auth
             string tokenUrl,
             string clientId,
             string clientSecret,
+            string? scope,
             OAuthFlow? flow,
             JsonSerializerSettings serializerSettings,
             IReadableConfiguration configuration) : base("")
@@ -42,6 +44,7 @@ namespace Org.OpenAPITools.Client.Auth
             _tokenUrl = tokenUrl;
             _clientId = clientId;
             _clientSecret = clientSecret;
+            _scope = scope;
             _serializerSettings = serializerSettings;
             _configuration = configuration;
 
@@ -88,6 +91,12 @@ namespace Org.OpenAPITools.Client.Auth
                 .AddParameter("grant_type", _grantType)
                 .AddParameter("client_id", _clientId)
                 .AddParameter("client_secret", _clientSecret);
+
+            if (!string.IsNullOrEmpty(_scope))
+            {
+                request.AddParameter("scope", _scope);
+            }
+
             var response = await client.PostAsync<TokenResponse>(request).ConfigureAwait(false);
             
             // RFC6749 - token_type is case insensitive.
diff --git a/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/Configuration.cs b/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/Configuration.cs
index f27abb3d78b..ee437ae11e5 100644
--- a/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/Configuration.cs
+++ b/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/Configuration.cs
@@ -399,6 +399,12 @@ namespace Org.OpenAPITools.Client
         /// <value>The OAuth Client Secret.</value>
         public virtual string OAuthClientSecret { get; set; }
 
+        /// <summary>
+        /// Gets or sets the client scope for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Client Scope.</value>
+        public virtual string? OAuthScope { get; set; }
+
         /// <summary>
         /// Gets or sets the flow for OAuth2 authentication.
         /// </summary>
@@ -736,6 +742,7 @@ namespace Org.OpenAPITools.Client
                 OAuthTokenUrl = second.OAuthTokenUrl ?? first.OAuthTokenUrl,
                 OAuthClientId = second.OAuthClientId ?? first.OAuthClientId,
                 OAuthClientSecret = second.OAuthClientSecret ?? first.OAuthClientSecret,
+                OAuthScope = second.OAuthScope ?? first.OAuthScope,
                 OAuthFlow = second.OAuthFlow ?? first.OAuthFlow,
                 HttpSigningConfiguration = second.HttpSigningConfiguration ?? first.HttpSigningConfiguration,
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
diff --git a/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/IReadableConfiguration.cs b/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
index 90ec4a6f193..986123acb8c 100644
--- a/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/net7/EnumMappings/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
@@ -46,6 +46,12 @@ namespace Org.OpenAPITools.Client
         /// <value>OAuth Client Secret.</value>
         string OAuthClientSecret { get; }
 
+        /// <summary>
+        /// Gets the OAuth token scope.
+        /// </summary>
+        /// <value>OAuth Token scope.</value>
+        string? OAuthScope { get; }
+
         /// <summary>
         /// Gets the OAuth flow.
         /// </summary>
diff --git a/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs b/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
index 69279ed569c..05e2ddb4de8 100644
--- a/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
+++ b/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
@@ -473,6 +473,7 @@ namespace Org.OpenAPITools.Client
                     configuration.OAuthTokenUrl,
                     configuration.OAuthClientId,
                     configuration.OAuthClientSecret,
+                    configuration.OAuthScope,
                     configuration.OAuthFlow,
                     SerializerSettings,
                     configuration);
diff --git a/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs b/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
index f900e716ae8..ce6261390c3 100644
--- a/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
+++ b/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
@@ -24,6 +24,7 @@ namespace Org.OpenAPITools.Client.Auth
         readonly string _tokenUrl;
         readonly string _clientId;
         readonly string _clientSecret;
+        readonly string? _scope;
         readonly string _grantType;
         readonly JsonSerializerSettings _serializerSettings;
         readonly IReadableConfiguration _configuration;
@@ -35,6 +36,7 @@ namespace Org.OpenAPITools.Client.Auth
             string tokenUrl,
             string clientId,
             string clientSecret,
+            string? scope,
             OAuthFlow? flow,
             JsonSerializerSettings serializerSettings,
             IReadableConfiguration configuration) : base("")
@@ -42,6 +44,7 @@ namespace Org.OpenAPITools.Client.Auth
             _tokenUrl = tokenUrl;
             _clientId = clientId;
             _clientSecret = clientSecret;
+            _scope = scope;
             _serializerSettings = serializerSettings;
             _configuration = configuration;
 
@@ -88,6 +91,12 @@ namespace Org.OpenAPITools.Client.Auth
                 .AddParameter("grant_type", _grantType)
                 .AddParameter("client_id", _clientId)
                 .AddParameter("client_secret", _clientSecret);
+
+            if (!string.IsNullOrEmpty(_scope))
+            {
+                request.AddParameter("scope", _scope);
+            }
+
             var response = await client.PostAsync<TokenResponse>(request).ConfigureAwait(false);
             
             // RFC6749 - token_type is case insensitive.
diff --git a/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/Configuration.cs b/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
index f27abb3d78b..ee437ae11e5 100644
--- a/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
+++ b/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
@@ -399,6 +399,12 @@ namespace Org.OpenAPITools.Client
         /// <value>The OAuth Client Secret.</value>
         public virtual string OAuthClientSecret { get; set; }
 
+        /// <summary>
+        /// Gets or sets the client scope for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Client Scope.</value>
+        public virtual string? OAuthScope { get; set; }
+
         /// <summary>
         /// Gets or sets the flow for OAuth2 authentication.
         /// </summary>
@@ -736,6 +742,7 @@ namespace Org.OpenAPITools.Client
                 OAuthTokenUrl = second.OAuthTokenUrl ?? first.OAuthTokenUrl,
                 OAuthClientId = second.OAuthClientId ?? first.OAuthClientId,
                 OAuthClientSecret = second.OAuthClientSecret ?? first.OAuthClientSecret,
+                OAuthScope = second.OAuthScope ?? first.OAuthScope,
                 OAuthFlow = second.OAuthFlow ?? first.OAuthFlow,
                 HttpSigningConfiguration = second.HttpSigningConfiguration ?? first.HttpSigningConfiguration,
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
diff --git a/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs b/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
index 90ec4a6f193..986123acb8c 100644
--- a/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/net7/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
@@ -46,6 +46,12 @@ namespace Org.OpenAPITools.Client
         /// <value>OAuth Client Secret.</value>
         string OAuthClientSecret { get; }
 
+        /// <summary>
+        /// Gets the OAuth token scope.
+        /// </summary>
+        /// <value>OAuth Token scope.</value>
+        string? OAuthScope { get; }
+
         /// <summary>
         /// Gets the OAuth flow.
         /// </summary>
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/ApiClient.cs b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/ApiClient.cs
index 0ad9a7e2d52..a55d7f34afc 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/ApiClient.cs
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/ApiClient.cs
@@ -474,6 +474,7 @@ namespace Org.OpenAPITools.Client
                     configuration.OAuthTokenUrl,
                     configuration.OAuthClientId,
                     configuration.OAuthClientSecret,
+                    configuration.OAuthScope,
                     configuration.OAuthFlow,
                     SerializerSettings,
                     configuration);
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
index f900e716ae8..d7fb1293b34 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
@@ -24,6 +24,7 @@ namespace Org.OpenAPITools.Client.Auth
         readonly string _tokenUrl;
         readonly string _clientId;
         readonly string _clientSecret;
+        readonly string _scope;
         readonly string _grantType;
         readonly JsonSerializerSettings _serializerSettings;
         readonly IReadableConfiguration _configuration;
@@ -35,6 +36,7 @@ namespace Org.OpenAPITools.Client.Auth
             string tokenUrl,
             string clientId,
             string clientSecret,
+            string scope,
             OAuthFlow? flow,
             JsonSerializerSettings serializerSettings,
             IReadableConfiguration configuration) : base("")
@@ -42,6 +44,7 @@ namespace Org.OpenAPITools.Client.Auth
             _tokenUrl = tokenUrl;
             _clientId = clientId;
             _clientSecret = clientSecret;
+            _scope = scope;
             _serializerSettings = serializerSettings;
             _configuration = configuration;
 
@@ -88,6 +91,12 @@ namespace Org.OpenAPITools.Client.Auth
                 .AddParameter("grant_type", _grantType)
                 .AddParameter("client_id", _clientId)
                 .AddParameter("client_secret", _clientSecret);
+
+            if (!string.IsNullOrEmpty(_scope))
+            {
+                request.AddParameter("scope", _scope);
+            }
+
             var response = await client.PostAsync<TokenResponse>(request).ConfigureAwait(false);
             
             // RFC6749 - token_type is case insensitive.
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/Configuration.cs b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/Configuration.cs
index 672bff291b8..513d074d882 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/Configuration.cs
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/Configuration.cs
@@ -394,6 +394,12 @@ namespace Org.OpenAPITools.Client
         /// <value>The OAuth Client Secret.</value>
         public virtual string OAuthClientSecret { get; set; }
 
+        /// <summary>
+        /// Gets or sets the client scope for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Client Scope.</value>
+        public virtual string OAuthScope { get; set; }
+
         /// <summary>
         /// Gets or sets the flow for OAuth2 authentication.
         /// </summary>
@@ -731,6 +737,7 @@ namespace Org.OpenAPITools.Client
                 OAuthTokenUrl = second.OAuthTokenUrl ?? first.OAuthTokenUrl,
                 OAuthClientId = second.OAuthClientId ?? first.OAuthClientId,
                 OAuthClientSecret = second.OAuthClientSecret ?? first.OAuthClientSecret,
+                OAuthScope = second.OAuthScope ?? first.OAuthScope,
                 OAuthFlow = second.OAuthFlow ?? first.OAuthFlow,
                 HttpSigningConfiguration = second.HttpSigningConfiguration ?? first.HttpSigningConfiguration,
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/IReadableConfiguration.cs b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
index 90ec4a6f193..8713a816f35 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/ConditionalSerialization/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
@@ -46,6 +46,12 @@ namespace Org.OpenAPITools.Client
         /// <value>OAuth Client Secret.</value>
         string OAuthClientSecret { get; }
 
+        /// <summary>
+        /// Gets the OAuth token scope.
+        /// </summary>
+        /// <value>OAuth Token scope.</value>
+        string OAuthScope { get; }
+
         /// <summary>
         /// Gets the OAuth flow.
         /// </summary>
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
index 0ad9a7e2d52..a55d7f34afc 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/ApiClient.cs
@@ -474,6 +474,7 @@ namespace Org.OpenAPITools.Client
                     configuration.OAuthTokenUrl,
                     configuration.OAuthClientId,
                     configuration.OAuthClientSecret,
+                    configuration.OAuthScope,
                     configuration.OAuthFlow,
                     SerializerSettings,
                     configuration);
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
index f900e716ae8..d7fb1293b34 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/Auth/OAuthAuthenticator.cs
@@ -24,6 +24,7 @@ namespace Org.OpenAPITools.Client.Auth
         readonly string _tokenUrl;
         readonly string _clientId;
         readonly string _clientSecret;
+        readonly string _scope;
         readonly string _grantType;
         readonly JsonSerializerSettings _serializerSettings;
         readonly IReadableConfiguration _configuration;
@@ -35,6 +36,7 @@ namespace Org.OpenAPITools.Client.Auth
             string tokenUrl,
             string clientId,
             string clientSecret,
+            string scope,
             OAuthFlow? flow,
             JsonSerializerSettings serializerSettings,
             IReadableConfiguration configuration) : base("")
@@ -42,6 +44,7 @@ namespace Org.OpenAPITools.Client.Auth
             _tokenUrl = tokenUrl;
             _clientId = clientId;
             _clientSecret = clientSecret;
+            _scope = scope;
             _serializerSettings = serializerSettings;
             _configuration = configuration;
 
@@ -88,6 +91,12 @@ namespace Org.OpenAPITools.Client.Auth
                 .AddParameter("grant_type", _grantType)
                 .AddParameter("client_id", _clientId)
                 .AddParameter("client_secret", _clientSecret);
+
+            if (!string.IsNullOrEmpty(_scope))
+            {
+                request.AddParameter("scope", _scope);
+            }
+
             var response = await client.PostAsync<TokenResponse>(request).ConfigureAwait(false);
             
             // RFC6749 - token_type is case insensitive.
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/Configuration.cs b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
index 672bff291b8..513d074d882 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/Configuration.cs
@@ -394,6 +394,12 @@ namespace Org.OpenAPITools.Client
         /// <value>The OAuth Client Secret.</value>
         public virtual string OAuthClientSecret { get; set; }
 
+        /// <summary>
+        /// Gets or sets the client scope for OAuth2 authentication.
+        /// </summary>
+        /// <value>The OAuth Client Scope.</value>
+        public virtual string OAuthScope { get; set; }
+
         /// <summary>
         /// Gets or sets the flow for OAuth2 authentication.
         /// </summary>
@@ -731,6 +737,7 @@ namespace Org.OpenAPITools.Client
                 OAuthTokenUrl = second.OAuthTokenUrl ?? first.OAuthTokenUrl,
                 OAuthClientId = second.OAuthClientId ?? first.OAuthClientId,
                 OAuthClientSecret = second.OAuthClientSecret ?? first.OAuthClientSecret,
+                OAuthScope = second.OAuthScope ?? first.OAuthScope,
                 OAuthFlow = second.OAuthFlow ?? first.OAuthFlow,
                 HttpSigningConfiguration = second.HttpSigningConfiguration ?? first.HttpSigningConfiguration,
                 TempFolderPath = second.TempFolderPath ?? first.TempFolderPath,
diff --git a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
index 90ec4a6f193..8713a816f35 100644
--- a/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
+++ b/samples/client/petstore/csharp/restsharp/standard2.0/Petstore/src/Org.OpenAPITools/Client/IReadableConfiguration.cs
@@ -46,6 +46,12 @@ namespace Org.OpenAPITools.Client
         /// <value>OAuth Client Secret.</value>
         string OAuthClientSecret { get; }
 
+        /// <summary>
+        /// Gets the OAuth token scope.
+        /// </summary>
+        /// <value>OAuth Token scope.</value>
+        string OAuthScope { get; }
+
         /// <summary>
         /// Gets the OAuth flow.
         /// </summary>