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diff --git a/src/DotNetOpenAuth.OAuth2/OAuth2/Messages/AccessTokenAuthorizationCodeRequest.cs b/src/DotNetOpenAuth.OAuth2/OAuth2/Messages/AccessTokenAuthorizationCodeRequest.cs
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+++ b/src/DotNetOpenAuth.OAuth2/OAuth2/Messages/AccessTokenAuthorizationCodeRequest.cs
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+//-----------------------------------------------------------------------
+// <copyright file="AccessTokenAuthorizationCodeRequest.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OAuth2.Messages {
+	using System;
+	using System.Collections.Generic;
+	using System.Diagnostics.Contracts;
+	using System.Linq;
+	using System.Text;
+
+	using DotNetOpenAuth.Messaging;
+	using DotNetOpenAuth.OAuth2.ChannelElements;
+
+	/// <summary>
+	/// A request from a Client to an Authorization Server to exchange an authorization code for an access token,
+	/// and (at the authorization server's option) a refresh token.
+	/// </summary>
+	internal class AccessTokenAuthorizationCodeRequest : AccessTokenRequestBase, IAuthorizationCarryingRequest {
+		/// <summary>
+		/// Initializes a new instance of the <see cref="AccessTokenAuthorizationCodeRequest"/> class.
+		/// </summary>
+		/// <param name="tokenEndpoint">The Authorization Server's access token endpoint URL.</param>
+		/// <param name="version">The version.</param>
+		internal AccessTokenAuthorizationCodeRequest(Uri tokenEndpoint, Version version)
+			: base(tokenEndpoint, version) {
+		}
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="AccessTokenAuthorizationCodeRequest"/> class.
+		/// </summary>
+		/// <param name="authorizationServer">The authorization server.</param>
+		internal AccessTokenAuthorizationCodeRequest(AuthorizationServerDescription authorizationServer)
+			: this(authorizationServer.TokenEndpoint, authorizationServer.Version) {
+			Requires.NotNull(authorizationServer, "authorizationServer");
+		}
+
+		/// <summary>
+		/// Gets the type of the code or token.
+		/// </summary>
+		/// <value>The type of the code or token.</value>
+		CodeOrTokenType IAuthorizationCarryingRequest.CodeOrTokenType {
+			get { return CodeOrTokenType.AuthorizationCode; }
+		}
+
+		/// <summary>
+		/// Gets or sets the verification code or refresh/access token.
+		/// </summary>
+		/// <value>The code or token.</value>
+		string IAuthorizationCarryingRequest.CodeOrToken {
+			get { return this.AuthorizationCode; }
+			set { this.AuthorizationCode = value; }
+		}
+
+		/// <summary>
+		/// Gets or sets the authorization that the token describes.
+		/// </summary>
+		IAuthorizationDescription IAuthorizationCarryingRequest.AuthorizationDescription { get; set; }
+
+		/// <summary>
+		/// Gets the type of the grant.
+		/// </summary>
+		/// <value>The type of the grant.</value>
+		internal override GrantType GrantType {
+			get { return Messages.GrantType.AuthorizationCode; }
+		}
+
+		/// <summary>
+		/// Gets or sets the verification code previously communicated to the Client
+		/// in <see cref="EndUserAuthorizationSuccessAuthCodeResponse.AuthorizationCode"/>.
+		/// </summary>
+		/// <value>The verification code received from the authorization server.</value>
+		[MessagePart(Protocol.code, IsRequired = true)]
+		internal string AuthorizationCode { get; set; }
+
+		/// <summary>
+		/// Gets or sets the callback URL used in <see cref="EndUserAuthorizationRequest.Callback"/>
+		/// </summary>
+		/// <value>
+		/// The Callback URL used to obtain the Verification Code.
+		/// </value>
+		[MessagePart(Protocol.redirect_uri, IsRequired = true)]
+		internal Uri Callback { get; set; }
+
+		/// <summary>
+		/// Gets the scope of operations the client is allowed to invoke.
+		/// </summary>
+		protected override HashSet<string> RequestedScope {
+			get { return ((IAuthorizationCarryingRequest)this).AuthorizationDescription.Scope; }
+		}
+	}
+}