diff --git a/modules/openapi-generator/src/main/resources/csharp/README.mustache b/modules/openapi-generator/src/main/resources/csharp/README.mustache
index 474bfe829b40..da6053f4aa26 100644
--- a/modules/openapi-generator/src/main/resources/csharp/README.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/README.mustache
@@ -119,9 +119,15 @@ namespace Example
             {{#hasAuthMethods}}
             {{#authMethods}}
             {{#isBasic}}
+            {{#isBasicBasic}}
             // Configure HTTP basic authorization: {{{name}}}
             Configuration.Default.Username = "YOUR_USERNAME";
             Configuration.Default.Password = "YOUR_PASSWORD";
+            {{/isBasicBasic}}
+            {{#isBasicBearer}}
+            // Configure HTTP bearer authorization: {{{name}}}
+            Configuration.Default.AccessToken = "YOUR_ACCESS_TOKEN";
+            {{/isBasicBearer}}
             {{/isBasic}}
             {{#isApiKey}}
             // Configure API key authorization: {{{name}}}
@@ -205,8 +211,14 @@ Authentication schemes defined for the API:
 - **Location**: {{#isKeyInQuery}}URL query string{{/isKeyInQuery}}{{#isKeyInHeader}}HTTP header{{/isKeyInHeader}}
 {{/isApiKey}}
 {{#isBasic}}
+{{#isBasicBasic}}
 
 - **Type**: HTTP basic authentication
+{{/isBasicBasic}}
+{{#isBasicBearer}}
+
+- **Type**: HTTP bearer authentication
+{{/isBasicBearer}}
 {{/isBasic}}
 {{#isOAuth}}
 
diff --git a/modules/openapi-generator/src/main/resources/csharp/api.mustache b/modules/openapi-generator/src/main/resources/csharp/api.mustache
index f040c439025d..a03009716943 100644
--- a/modules/openapi-generator/src/main/resources/csharp/api.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/api.mustache
@@ -278,11 +278,20 @@ namespace {{packageName}}.{{apiPackage}}
             {{/isKeyInQuery}}
             {{/isApiKey}}
             {{#isBasic}}
+            {{#isBasicBasic}}
             // http basic authentication required
             if (!String.IsNullOrEmpty(this.Configuration.Username) || !String.IsNullOrEmpty(this.Configuration.Password))
             {
                 localVarHeaderParams["Authorization"] = "Basic " + ApiClient.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password);
             }
+            {{/isBasicBasic}}
+            {{#isBasicBearer}}
+            // http beerer authentication required
+            if (!String.IsNullOrEmpty(this.Configuration.AccessToken))
+            {
+                localVarHeaderParams["Authorization"] = "Bearer " + this.Configuration.AccessToken;
+            }
+            {{/isBasicBearer}}
             {{/isBasic}}
             {{#isOAuth}}
             // oauth required
@@ -414,11 +423,20 @@ namespace {{packageName}}.{{apiPackage}}
             {{/isKeyInQuery}}
             {{/isApiKey}}
             {{#isBasic}}
+            {{#isBasicBasic}}
             // http basic authentication required
             if (!String.IsNullOrEmpty(this.Configuration.Username) || !String.IsNullOrEmpty(this.Configuration.Password))
             {
                 localVarHeaderParams["Authorization"] = "Basic " + ApiClient.Base64Encode(this.Configuration.Username + ":" + this.Configuration.Password);
             }
+            {{/isBasicBasic}}
+            {{#isBasicBearer}}
+            // http bearer authentication required
+            if (!String.IsNullOrEmpty(this.Configuration.AccessToken))
+            {
+                localVarHeaderParams["Authorization"] = "Bearer " + this.Configuration.AccessToken;
+            }
+            {{/isBasicBearer}}
             {{/isBasic}}
             {{#isOAuth}}
             // oauth required
diff --git a/modules/openapi-generator/src/main/resources/csharp/api_doc.mustache b/modules/openapi-generator/src/main/resources/csharp/api_doc.mustache
index df59f42415cf..6e4bbf7c9a43 100644
--- a/modules/openapi-generator/src/main/resources/csharp/api_doc.mustache
+++ b/modules/openapi-generator/src/main/resources/csharp/api_doc.mustache
@@ -39,9 +39,15 @@ namespace Example
             {{#hasAuthMethods}}
             {{#authMethods}}
             {{#isBasic}}
+            {{#isBasicBasic}}
             // Configure HTTP basic authorization: {{{name}}}
             Configuration.Default.Username = "YOUR_USERNAME";
             Configuration.Default.Password = "YOUR_PASSWORD";
+            {{/isBasicBasic}}
+            {{#isBasicBearer}}
+            // Configure HTTP bearer authorization: {{{name}}}
+            Configuration.Default.AccessToken = "YOUR_ACCESS_TOKEN";
+            {{/isBasicBearer}}
             {{/isBasic}}
             {{#isApiKey}}
             // Configure API key authorization: {{{name}}}
diff --git a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Model/FormatTest.cs b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Model/FormatTest.cs
index 31193ac39608..eedd4b6236e1 100644
--- a/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Model/FormatTest.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientNet40/src/Org.OpenAPITools/Model/FormatTest.cs
@@ -367,6 +367,8 @@ public override int GetHashCode()
         /// <returns>Validation Result</returns>
         IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
         {
+
+            
             // Integer (int) maximum
             if(this.Integer > (int)100)
             {
@@ -379,6 +381,8 @@ public override int GetHashCode()
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Integer, must be a value greater than or equal to 10.", new [] { "Integer" });
             }
 
+
+            
             // Int32 (int) maximum
             if(this.Int32 > (int)200)
             {
@@ -391,6 +395,8 @@ public override int GetHashCode()
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Int32, must be a value greater than or equal to 20.", new [] { "Int32" });
             }
 
+
+            
             // Number (decimal) maximum
             if(this.Number > (decimal)543.2)
             {
@@ -403,6 +409,8 @@ public override int GetHashCode()
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Number, must be a value greater than or equal to 32.1.", new [] { "Number" });
             }
 
+
+            
             // Float (float) maximum
             if(this.Float > (float)987.6)
             {
@@ -415,6 +423,8 @@ public override int GetHashCode()
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Float, must be a value greater than or equal to 54.3.", new [] { "Float" });
             }
 
+
+            
             // Double (double) maximum
             if(this.Double > (double)123.4)
             {
@@ -427,6 +437,8 @@ public override int GetHashCode()
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Double, must be a value greater than or equal to 67.8.", new [] { "Double" });
             }
 
+
+            
             // String (string) pattern
             Regex regexString = new Regex(@"[a-z]", RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);
             if (false == regexString.Match(this.String).Success)
@@ -434,6 +446,8 @@ public override int GetHashCode()
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for String, must match a pattern of " + regexString, new [] { "String" });
             }
 
+
+            
             // Password (string) maxLength
             if(this.Password != null && this.Password.Length > 64)
             {
@@ -445,7 +459,7 @@ public override int GetHashCode()
             {
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Password, length must be greater than 10.", new [] { "Password" });
             }
-
+            
             yield break;
         }
     }
diff --git a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Model/FormatTest.cs b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Model/FormatTest.cs
index d8452eb07cb6..b3ebc9f373b9 100644
--- a/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Model/FormatTest.cs
+++ b/samples/client/petstore/csharp/OpenAPIClientWithPropertyChanged/src/Org.OpenAPITools/Model/FormatTest.cs
@@ -390,6 +390,8 @@ public virtual void OnPropertyChanged(string propertyName)
         /// <returns>Validation Result</returns>
         IEnumerable<System.ComponentModel.DataAnnotations.ValidationResult> IValidatableObject.Validate(ValidationContext validationContext)
         {
+
+            
             // Integer (int) maximum
             if(this.Integer > (int)100)
             {
@@ -402,6 +404,8 @@ public virtual void OnPropertyChanged(string propertyName)
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Integer, must be a value greater than or equal to 10.", new [] { "Integer" });
             }
 
+
+            
             // Int32 (int) maximum
             if(this.Int32 > (int)200)
             {
@@ -414,6 +418,8 @@ public virtual void OnPropertyChanged(string propertyName)
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Int32, must be a value greater than or equal to 20.", new [] { "Int32" });
             }
 
+
+            
             // Number (decimal) maximum
             if(this.Number > (decimal)543.2)
             {
@@ -426,6 +432,8 @@ public virtual void OnPropertyChanged(string propertyName)
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Number, must be a value greater than or equal to 32.1.", new [] { "Number" });
             }
 
+
+            
             // Float (float) maximum
             if(this.Float > (float)987.6)
             {
@@ -438,6 +446,8 @@ public virtual void OnPropertyChanged(string propertyName)
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Float, must be a value greater than or equal to 54.3.", new [] { "Float" });
             }
 
+
+            
             // Double (double) maximum
             if(this.Double > (double)123.4)
             {
@@ -450,6 +460,8 @@ public virtual void OnPropertyChanged(string propertyName)
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Double, must be a value greater than or equal to 67.8.", new [] { "Double" });
             }
 
+
+            
             // String (string) pattern
             Regex regexString = new Regex(@"[a-z]", RegexOptions.CultureInvariant | RegexOptions.IgnoreCase);
             if (false == regexString.Match(this.String).Success)
@@ -457,6 +469,8 @@ public virtual void OnPropertyChanged(string propertyName)
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for String, must match a pattern of " + regexString, new [] { "String" });
             }
 
+
+            
             // Password (string) maxLength
             if(this.Password != null && this.Password.Length > 64)
             {
@@ -468,7 +482,7 @@ public virtual void OnPropertyChanged(string propertyName)
             {
                 yield return new System.ComponentModel.DataAnnotations.ValidationResult("Invalid value for Password, length must be greater than 10.", new [] { "Password" });
             }
-
+            
             yield break;
         }
     }