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I find that my HTTPWebRequest Upload is failing at the very end of the upload ... as shown in this video @Screenr My Code is like below using (var reqStream = req.GetRequestStream()) { BinaryWriter reqWriter = new BinaryWriter(reqStream); byte[] buffer = new byte[25600]; // 20KB Buffer int read = 0, bytesRead = 0; while ((read = memStream.Read(buffer, 0, buffer.Length)) > 0) { reqWriter.Write(buffer); // at the very last loop, this line causes the error bytesRead += read; Debug.WriteLine("Percent Done: " + ((double)bytesRead / memStream.Length * 100) + "% " + DateTime.Now); } I don't know if you need more code, I just don't want to spam code here. the exception below System.Net.WebException was caught Message=The request was aborted: The request was canceled. Source=System StackTrace: at System.Net.ConnectStream.CloseInternal(Boolean internalCall, Boolean aborting) at System.Net.ConnectStream.System.Net.ICloseEx.CloseEx(CloseExState closeState) at System.Net.ConnectStream.Dispose(Boolean disposing) at System.IO.Stream.Close() at System.IO.Stream.Dispose() at QuickImageUpload.ViewModels.ShellViewModel.UploadImage(String filename, String contentType, Byte[] image) in D:\Projects\QuickImageUpload\QuickImageUpload\ViewModels\ShellViewModel.cs:line 190 InnerException: System.IO.IOException Message=Cannot close stream until all bytes are written. Source=System StackTrace: at System.Net.ConnectStream.CloseInternal(Boolean internalCall, Boolean aborting) InnerException: Notice the inner exception "Cannot close stream until all bytes are written.". But I havent close any streams in this loop have I?

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