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-rw-r--r--src/DotNetOAuth/Messaging/ProtocolException.cs7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/DotNetOAuth/Messaging/ProtocolException.cs b/src/DotNetOAuth/Messaging/ProtocolException.cs
index 10cb884..6101073 100644
--- a/src/DotNetOAuth/Messaging/ProtocolException.cs
+++ b/src/DotNetOAuth/Messaging/ProtocolException.cs
@@ -90,7 +90,12 @@ namespace DotNetOAuth.Messaging {
/// This property should only be called when the error is being sent as an indirect response.
/// </remarks>
Uri IDirectedProtocolMessage.Recipient {
- get { return this.recipient; }
+ get {
+ if (this.inResponseTo == null) {
+ throw new InvalidOperationException(MessagingStrings.ExceptionNotConstructedForTransit);
+ }
+ return this.recipient;
+ }
}
#endregion