diff --git a/modules/swagger-codegen/src/main/resources/csharp/model.mustache b/modules/swagger-codegen/src/main/resources/csharp/model.mustache
index ce0e62de192..111c98993a2 100644
--- a/modules/swagger-codegen/src/main/resources/csharp/model.mustache
+++ b/modules/swagger-codegen/src/main/resources/csharp/model.mustache
@@ -13,7 +13,7 @@ namespace {{package}} {
   /// {{description}}
   /// </summary>
   [DataContract]
-  public class {{classname}} {
+  public class {{classname}}{{#parent}} : {{{parent}}}{{/parent}} {
     {{#vars}}
     {{#description}}/* {{{description}}} */{{/description}}
     [DataMember(Name="{{baseName}}", EmitDefaultValue=false)]
@@ -39,11 +39,11 @@ namespace {{package}} {
     /// Get the JSON string presentation of the object
     /// </summary>
     /// <returns>JSON string presentation of the object</returns>
-    public string ToJson() {
+    public {{#parent}} new {{/parent}}string ToJson() {
       return JsonConvert.SerializeObject(this, Formatting.Indented);
     }
 
 }
   {{/model}}
   {{/models}}
-}
+}
\ No newline at end of file