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.NET Framework 3.0
|Cancelled||Gets a value indicating whether an asynchronous operation has been canceled. (inherited from AsyncCompletedEventArgs)|
|Error||Gets a value indicating which error occurred during an asynchronous operation. (inherited from AsyncCompletedEventArgs)|
|Result||Gets the server reply to a string upload operation that is started by calling an UploadStringAsync method.|
|UserState||Gets the unique identifier for the asynchronous task. (inherited from AsyncCompletedEventArgs)|