diff --git a/modules/openapi-generator/src/main/resources/csharp/api.mustache b/modules/openapi-generator/src/main/resources/csharp/api.mustache
index 4f0a06f234e..cdbb940d3f5 100644
--- a/modules/openapi-generator/src/main/resources/csharp/api.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/api.mustache
@@ -93,6 +93,17 @@ namespace {{packageName}}.{{apiPackage}}
             ExceptionFactory = {{packageName}}.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="{{classname}}"/> class
+        /// </summary>
+        /// <returns></returns>
+        public {{classname}}()
+        {
+            this.Configuration = {{packageName}}.Client.Configuration.Default;
+
+            ExceptionFactory = {{packageName}}.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="{{classname}}"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/AnotherFakeApi.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
index aacccf92ca5..cf759d5e82c 100644
--- a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
@@ -89,6 +89,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AnotherFakeApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public AnotherFakeApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="AnotherFakeApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs
index 60e219ead9d..6d0928a226a 100644
--- a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeApi.cs
@@ -597,6 +597,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FakeApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public FakeApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FakeApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
index cba038ef133..07156e17824 100644
--- a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
@@ -89,6 +89,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FakeClassnameTags123Api"/> class
+        /// </summary>
+        /// <returns></returns>
+        public FakeClassnameTags123Api()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FakeClassnameTags123Api"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/PetApi.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/PetApi.cs
index 2fb6528b32e..8f2f2105e2f 100644
--- a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/PetApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/PetApi.cs
@@ -453,6 +453,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PetApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public PetApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="PetApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/StoreApi.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/StoreApi.cs
index d03577102bf..4902eb5b1af 100644
--- a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/StoreApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/StoreApi.cs
@@ -211,6 +211,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StoreApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public StoreApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="StoreApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/UserApi.cs b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/UserApi.cs
index 868ca751648..0eba85ddf63 100644
--- a/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/UserApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClient/src/Org.OpenAPITools/Api/UserApi.cs
@@ -387,6 +387,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="UserApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public UserApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="UserApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet35/.openapi-generator/VERSION b/samples/client/petstore/csharp/OpenAPIClientNet35/.openapi-generator/VERSION
index a6527129083..319a3673c11 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet35/.openapi-generator/VERSION
+++ b/samples/client/petstore/csharp/OpenAPIClientNet35/.openapi-generator/VERSION
@@ -1 +1 @@
-3.3.2-SNAPSHOT
\ No newline at end of file
+3.3.2-SNAPSHOT
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/AnotherFakeApi.cs b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
index 193c4907a1e..65d361bc200 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
@@ -66,6 +66,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AnotherFakeApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public AnotherFakeApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="AnotherFakeApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/FakeApi.cs b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/FakeApi.cs
index 20430b4bbdb..ed151e1bc20 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/FakeApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/FakeApi.cs
@@ -320,6 +320,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FakeApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public FakeApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FakeApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
index db256a41861..63f51ab5875 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
@@ -66,6 +66,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FakeClassnameTags123Api"/> class
+        /// </summary>
+        /// <returns></returns>
+        public FakeClassnameTags123Api()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FakeClassnameTags123Api"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/PetApi.cs b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/PetApi.cs
index 6ec963b56ee..1c0444f8bb3 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/PetApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/PetApi.cs
@@ -248,6 +248,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PetApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public PetApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="PetApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/StoreApi.cs b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/StoreApi.cs
index bf73f16648a..778cc6a6399 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/StoreApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/StoreApi.cs
@@ -127,6 +127,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StoreApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public StoreApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="StoreApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/UserApi.cs b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/UserApi.cs
index 4c5f2a4ef03..c746905213b 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/UserApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet35/src/Org.OpenAPITools/Api/UserApi.cs
@@ -215,6 +215,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="UserApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public UserApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="UserApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet40/.openapi-generator/VERSION b/samples/client/petstore/csharp/OpenAPIClientNet40/.openapi-generator/VERSION
index a6527129083..319a3673c11 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet40/.openapi-generator/VERSION
+++ b/samples/client/petstore/csharp/OpenAPIClientNet40/.openapi-generator/VERSION
@@ -1 +1 @@
-3.3.2-SNAPSHOT
\ No newline at end of file
+3.3.2-SNAPSHOT
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/AnotherFakeApi.cs b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
index 71bcd84a663..dd32c4300ab 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
@@ -66,6 +66,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AnotherFakeApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public AnotherFakeApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="AnotherFakeApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/FakeApi.cs b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/FakeApi.cs
index c2f338c3bb7..765a1444172 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/FakeApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/FakeApi.cs
@@ -320,6 +320,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FakeApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public FakeApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FakeApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
index b947e633b5f..99c32e13e11 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
@@ -66,6 +66,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FakeClassnameTags123Api"/> class
+        /// </summary>
+        /// <returns></returns>
+        public FakeClassnameTags123Api()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FakeClassnameTags123Api"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/PetApi.cs b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/PetApi.cs
index ca532940cf0..1c596393525 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/PetApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/PetApi.cs
@@ -248,6 +248,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PetApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public PetApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="PetApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/StoreApi.cs b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/StoreApi.cs
index c318ec0d073..e45658963ea 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/StoreApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/StoreApi.cs
@@ -127,6 +127,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StoreApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public StoreApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="StoreApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/UserApi.cs b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/UserApi.cs
index 9cd5eff5ce0..62f1c2181ea 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/UserApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Api/UserApi.cs
@@ -215,6 +215,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="UserApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public UserApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="UserApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNetStandard/.openapi-generator/VERSION b/samples/client/petstore/csharp/OpenAPIClientNetStandard/.openapi-generator/VERSION
index a6527129083..319a3673c11 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNetStandard/.openapi-generator/VERSION
+++ b/samples/client/petstore/csharp/OpenAPIClientNetStandard/.openapi-generator/VERSION
@@ -1 +1 @@
-3.3.2-SNAPSHOT
\ No newline at end of file
+3.3.2-SNAPSHOT
diff --git a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/AnotherFakeApi.cs b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
index 57dcf5ca7b3..8da2f97f375 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
@@ -89,6 +89,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AnotherFakeApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public AnotherFakeApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="AnotherFakeApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/FakeApi.cs b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/FakeApi.cs
index da68811f95a..95cb32fd782 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/FakeApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/FakeApi.cs
@@ -597,6 +597,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FakeApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public FakeApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FakeApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
index 56e8adf1933..f73a932acde 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
@@ -89,6 +89,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FakeClassnameTags123Api"/> class
+        /// </summary>
+        /// <returns></returns>
+        public FakeClassnameTags123Api()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FakeClassnameTags123Api"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/PetApi.cs b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/PetApi.cs
index e07717ae436..c6c1644b386 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/PetApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/PetApi.cs
@@ -453,6 +453,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PetApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public PetApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="PetApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/StoreApi.cs b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/StoreApi.cs
index d8184086b8d..851c41d3a94 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/StoreApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/StoreApi.cs
@@ -211,6 +211,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StoreApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public StoreApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="StoreApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/UserApi.cs b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/UserApi.cs
index 3d32cf792a2..b22ab90c883 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/UserApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNetStandard/src/Org.OpenAPITools/Api/UserApi.cs
@@ -387,6 +387,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="UserApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public UserApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="UserApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/.openapi-generator/VERSION b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/.openapi-generator/VERSION
index a6527129083..319a3673c11 100644
--- a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/.openapi-generator/VERSION
+++ b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/.openapi-generator/VERSION
@@ -1 +1 @@
-3.3.2-SNAPSHOT
\ No newline at end of file
+3.3.2-SNAPSHOT
diff --git a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/AnotherFakeApi.cs b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
index aacccf92ca5..cf759d5e82c 100644
--- a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/AnotherFakeApi.cs
@@ -89,6 +89,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="AnotherFakeApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public AnotherFakeApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="AnotherFakeApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/FakeApi.cs b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/FakeApi.cs
index 60e219ead9d..6d0928a226a 100644
--- a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/FakeApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/FakeApi.cs
@@ -597,6 +597,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FakeApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public FakeApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FakeApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
index cba038ef133..07156e17824 100644
--- a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/FakeClassnameTags123Api.cs
@@ -89,6 +89,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="FakeClassnameTags123Api"/> class
+        /// </summary>
+        /// <returns></returns>
+        public FakeClassnameTags123Api()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="FakeClassnameTags123Api"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/PetApi.cs b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/PetApi.cs
index 2fb6528b32e..8f2f2105e2f 100644
--- a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/PetApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/PetApi.cs
@@ -453,6 +453,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PetApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public PetApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="PetApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/StoreApi.cs b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/StoreApi.cs
index d03577102bf..4902eb5b1af 100644
--- a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/StoreApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/StoreApi.cs
@@ -211,6 +211,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StoreApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public StoreApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="StoreApi"/> class
         /// using Configuration object
diff --git a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/UserApi.cs b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/UserApi.cs
index 868ca751648..0eba85ddf63 100644
--- a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/UserApi.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Api/UserApi.cs
@@ -387,6 +387,17 @@ namespace Org.OpenAPITools.Api
             ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="UserApi"/> class
+        /// </summary>
+        /// <returns></returns>
+        public UserApi()
+        {
+            this.Configuration = Org.OpenAPITools.Client.Configuration.Default;
+
+            ExceptionFactory = Org.OpenAPITools.Client.Configuration.DefaultExceptionFactory;
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="UserApi"/> class
         /// using Configuration object