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-rw-r--r--src/DotNetOAuth/Messaging/IProtocolMessage.cs9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/DotNetOAuth/Messaging/IProtocolMessage.cs b/src/DotNetOAuth/Messaging/IProtocolMessage.cs
index 61df813..a95822c 100644
--- a/src/DotNetOAuth/Messaging/IProtocolMessage.cs
+++ b/src/DotNetOAuth/Messaging/IProtocolMessage.cs
@@ -30,6 +30,15 @@ namespace DotNetOAuth.Messaging {
MessageTransport Transport { get; }
/// <summary>
+ /// Gets the dictionary of additional name/value fields tacked on to this message.
+ /// </summary>
+ /// <remarks>
+ /// Implementations of <see cref="IProtocolMessage"/> 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>