public override Task <Stream> GetRequestStreamAsync() { CheckAndMarkAsyncGetRequestStreamPending(); return(Task.Factory.StartNew(s => { FileWebRequest thisRef = (FileWebRequest)s !; Stream writeStream = thisRef.CreateWriteStream(); thisRef._writePending = false; return writeStream; }, this, CancellationToken.None, TaskCreationOptions.DenyChildAttach, TaskScheduler.Default)); }