Index: Src/GoogleApis.Auth/OAuth2/Requests/AuthorizationCodeRequestUrl.cs
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+/*
+Copyright 2013 Google Inc
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+using Google.Apis.Requests;
+using Google.Apis.Requests.Parameters;
+
+namespace Google.Apis.Auth.OAuth2.Requests
+{
+    /// <summary>
+    /// OAuth 2.0 request URL for an authorization web page to allow the end user to authorize the application to 
+    /// access their protected resources and that returns an authorization code, as specified in 
+    /// http://tools.ietf.org/html/rfc6749#section-4.1.
+    /// </summary>
+    public class AuthorizationCodeRequestUrl : AuthorizationRequestUrl
+    {
+        /// <summary>
+        /// Constructs a new authorization code request with the specified URI and sets response_type to <c>code</c>.
+        /// </summary>
+        public AuthorizationCodeRequestUrl(Uri authorizationServerEncodedUrl)
+            : base(authorizationServerEncodedUrl)
+        {
+            ResponseType = "code";
+        }
+
+        /// <summary>Creates a <seealso cref="System.Uri"/> which is used to request the authorization code.</summary>
+        public Uri Build()
+        {
+            var builder = new RequestBuilder()
+                {
+                    BaseUri = AuthorizationServerEncodedUrl
+                };
+            ParameterUtils.InitParameters(builder, this);
+            return builder.BuildUri();
+        }
+    }
+}