Include full response object in ApiException

Author: EraYaN

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

@@ -1,11 +1,11 @@
 // <auto-generated>
 {{>partial_header}}
-
 {{#nrt}}
 #nullable enable
 
 {{/nrt}}
 using System;
+using System.IO;
 
 namespace {{packageName}}.{{clientPackage}}
 {
@@ -28,20 +28,27 @@ namespace {{packageName}}.{{clientPackage}}
         /// The raw data returned by the api
         /// </summary>
         public string RawContent { get; }
+
+        /// <summary>
+        /// The HttpResponseMessage object
+        /// </summary>
+        public System.Net.Http.HttpResponseMessage? RawResponse { get; }
 
         /// <summary>
         /// Construct the ApiException from parts of the response
         /// </summary>
         /// <param name="reasonPhrase"></param>
         /// <param name="statusCode"></param>
         /// <param name="rawContent"></param>
-        public ApiException(string{{nrt?}} reasonPhrase, System.Net.HttpStatusCode statusCode, string rawContent) : base(reasonPhrase ?? rawContent)
+        public ApiException(string{{nrt?}} reasonPhrase, System.Net.HttpStatusCode statusCode, string rawContent, System.Net.Http.HttpResponseMessage? rawResponse = null) : base(reasonPhrase ?? rawContent)
         {
             ReasonPhrase = reasonPhrase;
 
             StatusCode = statusCode;
 
             RawContent = rawContent;
+
+            RawResponse = rawResponse;
         }
     }
 }