Index: Src/GoogleApis.Auth/OAuth2/Requests/TokenRequest.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;
+
+namespace Google.Apis.Auth.OAuth2.Requests
+{
+    /// <summary>
+    /// OAuth 2.0 request for an access token as specified in http://tools.ietf.org/html/rfc6749#section-4.
+    /// </summary>
+    public class TokenRequest
+    {
+        /// <summary>
+        /// Gets or sets space-separated list of scopes as specified in http://tools.ietf.org/html/rfc6749#section-3.3.
+        /// </summary>
+        [Google.Apis.Util.RequestParameterAttribute("scope")]
+        public string Scope { get; set; }
+
+        /// <summary>
+        /// Gets or sets the Grant type. Sets <c>authorization_code</c> or <c>password</c> or <c>client_credentials</c> 
+        /// or <c>refresh_token</c> or absolute URI of the extension grant type.
+        /// </summary>
+        [Google.Apis.Util.RequestParameterAttribute("grant_type")]
+        public string GrantType { get; set; }
+
+        /// <summary>Gets or sets the client Identifier.</summary>
+        [Google.Apis.Util.RequestParameterAttribute("client_id")]
+        public string ClientId { get; set; }
+
+        /// <summary>Gets or sets the client Secret.</summary>
+        [Google.Apis.Util.RequestParameterAttribute("client_secret")]
+        public string ClientSecret { get; set; }
+    }
+}