Revert adding HttpOperationException

Author: jasonxu08

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

@@ -5,7 +5,6 @@
 
 {{/nrt}}
 using System;
-using System.Net.Http;
 
 namespace {{packageName}}.{{clientPackage}}
 {
@@ -44,20 +43,4 @@ namespace {{packageName}}.{{clientPackage}}
             RawContent = rawContent;
         }
     }
-
-    /// <summary>
-    /// Http Operation Exception
-    /// </summary>
-    {{>visibility}} class HttpOperationException : Exception
-    {
-        {{>visibility}} HttpRequestMessage Request { get; }
-        {{>visibility}} HttpResponseMessage Response { get; }
-
-        {{>visibility}} HttpOperationException(HttpRequestMessage request, HttpResponseMessage response, string message)
-            : base(message)
-        {
-            Request = request;
-            Response = response;
-        }
-    }
 }

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

@@ -32,6 +32,8 @@ using {{packageName}}.{{modelPackage}};
 using System.Diagnostics.CodeAnalysis;
 {{/netStandard}}
 using {{packageName}}.{{package}};
+// DNV customization: Todo: Microsoft.Rest will be removed
+using Microsoft.Rest;
 
 namespace {{packageName}}.{{package}}
 {
@@ -658,6 +660,13 @@ namespace {{packageName}}
 
                     DateTime requestedAtLocalVar = DateTime.UtcNow;
 
+                    // DNV customization: Save request and response
+                    string requestContentLocalVar = string.Empty;
+                    if (httpRequestMessageLocalVar.Content != null)
+                    {
+                        requestContentLocalVar = await httpRequestMessageLocalVar.Content.ReadAsStringAsync().ConfigureAwait(false);
+                        httpRequestMessageLocalVar.Content = new StringContent(requestContentLocalVar, System.Text.Encoding.UTF8, "application/json");
+                    }
                     using (HttpResponseMessage httpResponseMessageLocalVar = await HttpClient.SendAsync(httpRequestMessageLocalVar, cancellationToken).ConfigureAwait(false))
                     {
                         string responseContentLocalVar = string.Empty;
@@ -666,7 +675,11 @@ namespace {{packageName}}
                         }
                         if (!httpResponseMessageLocalVar.IsSuccessStatusCode)
                         {
-                            throw new HttpOperationException(httpRequestMessageLocalVar, httpResponseMessageLocalVar, string.Format("Operation returned an invalid status code '{0}'", httpResponseMessageLocalVar.StatusCode));
+                            throw new HttpOperationException(string.Format("Operation returned an invalid status code '{0}'", httpResponseMessageLocalVar.StatusCode))
+                            {
+                                Request = new HttpRequestMessageWrapper(httpRequestMessageLocalVar, requestContentLocalVar),
+                                Response = new HttpResponseMessageWrapper(httpResponseMessageLocalVar, responseContentLocalVar)
+                            };
                         }
 
                         ILogger<{{#vendorExtensions.x-duplicates}}{{.}}.{{/vendorExtensions.x-duplicates}}{{operationId}}ApiResponse> apiResponseLoggerLocalVar = LoggerFactory.CreateLogger<{{#vendorExtensions.x-duplicates}}{{.}}.{{/vendorExtensions.x-duplicates}}{{operationId}}ApiResponse>();

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

@@ -101,9 +101,6 @@
         {{/isDiscriminator}}
         {{/allVars}}
         /// <param name="dummy">dummy to avoid duplicated ctors</param>
-        {{^composedSchemas.anyOf}}
-        [JsonConstructor]
-        {{/composedSchemas.anyOf}}
         {{#model.vendorExtensions.x-model-is-mutable}}{{>visibility}}{{/model.vendorExtensions.x-model-is-mutable}}{{^model.vendorExtensions.x-model-is-mutable}}internal{{/model.vendorExtensions.x-model-is-mutable}} {{classname}}({{#lambda.joinWithComma}}{{#composedSchemas.anyOf}}{{{baseType}}}{{>NullConditionalProperty}} {{#lambda.escape_reserved_word}}{{#lambda.camel_case}}{{name}}{{/lambda.camel_case}}{{/lambda.escape_reserved_word}}  {{/composedSchemas.anyOf}}{{#model.allVars}}{{^isDiscriminator}}{{{datatypeWithEnum}}}{{>NullConditionalProperty}} {{#lambda.escape_reserved_word}}{{#lambda.camel_case}}{{name}}{{/lambda.camel_case}}{{/lambda.escape_reserved_word}}  {{/isDiscriminator}}{{/model.allVars}}{{/lambda.joinWithComma}}, bool dummy = true){{#parent}} : base({{#lambda.joinWithComma}}{{>ModelBaseSignature}}{{/lambda.joinWithComma}}){{/parent}}
         {
             {{#composedSchemas.anyOf}}
@@ -112,7 +109,7 @@
             {{#allVars}}
             {{^isDiscriminator}}
             {{^isInherited}}
-            {{name}} = {{#lambda.escape_reserved_word}}{{#lambda.camel_case}}{{name}}{{/lambda.camel_case}}{{/lambda.escape_reserved_word}};
+            {{name}}{{#isReadOnly}}{{^required}}Option{{/required}}{{/isReadOnly}} = {{#isReadOnly}}{{^required}}new({{/required}}{{/isReadOnly}}{{#lambda.escape_reserved_word}}{{#lambda.camel_case}}{{name}}{{/lambda.camel_case}}{{/lambda.escape_reserved_word}}{{#isReadOnly}}{{^required}}){{/required}}{{/isReadOnly}};
             {{/isInherited}}
             {{#isInherited}}
             {{#isNew}}