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//-----------------------------------------------------------------------
// <copyright file="IMessage.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.Messaging {
using System;
using System.Collections.Generic;
using System.Text;
/// <summary>
/// The interface that classes must implement to be serialized/deserialized
/// as protocol or extension messages.
/// </summary>
public interface IMessage {
/// <summary>
/// Gets the version of the protocol or extension this message is prepared to implement.
/// </summary>
/// <remarks>
/// Implementations of this interface should ensure that this property never returns null.
/// </remarks>
Version Version { get; }
/// <summary>
/// Gets the extra, non-standard Protocol parameters included in the message.
/// </summary>
/// <remarks>
/// Implementations of this interface should ensure that this property never returns null.
/// </remarks>
IDictionary<string, string> ExtraData { get; }
/// <summary>
/// Checks the message state for conformity to the protocol specification
/// and throws an exception if the message is invalid.
/// </summary>
/// <remarks>
/// <para>Some messages have required fields, or combinations of fields that must relate to each other
/// in specialized ways. After deserializing a message, this method checks the state of the
/// message to see if it conforms to the protocol.</para>
/// <para>Note that this property should <i>not</i> check signatures or perform any state checks
/// outside this scope of this particular message.</para>
/// </remarks>
/// <exception cref="ProtocolException">Thrown if the message is invalid.</exception>
void EnsureValidMessage();
}
}
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