public void ReadProgress(int bytesRead) { if (callback == null) { return; } // Invoke the progress callback only if bytes read > 0 if (bytesRead > 0) { totalBytesRead += bytesRead; totalIncrementTransferred += bytesRead; if (totalIncrementTransferred >= this.progressUpdateInterval || totalBytesRead == contentLength) { OssUtils.InvokeInBackground( callback, new StreamTransferProgressArgs(totalIncrementTransferred, totalBytesRead, contentLength), sender); totalIncrementTransferred = 0; } } }