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I get an Out of Memory Exception when using Http.Put of a large file. I am using an asynchronous model as shown in the code. I am trying to send 8K blocks of data to a Windows 2008 R2 server. The exception consistently occurs when I attempt to write a block of data that exceeds 536,868,864 bytes. The exception occurs on the requestStream.Write method in the code snippet below. Looking for reasons why? Note: Smaller files are PUT OK. Logic also works if I write to a local FileStream. Running VS 2010, .Net 4.0 on Win 7 Ultimate client computer. HttpWebRequest request = (HttpWebRequest)WebRequest.Create("Http://website/FileServer/filename"); request.Method = WebRequestMethods.Http.Put; request.SendChunked = true; request.AllowWriteStreamBuffering = true; ... request.BeginGetRequestStream( new AsyncCallback(EndGetStreamCallback), state); ... int chunk = 8192; // other values give same result .... private static void EndGetStreamCallback(IAsyncResult ar) { long limit = 0; long fileLength; HttpState state = (HttpState)ar.AsyncState; Stream requestStream = null; // End the asynchronous call to get the request stream. try { requestStream = state.Request.EndGetRequestStream(ar); // Copy the file contents to the request stream. FileStream stream = new FileStream(state.FileName, FileMode.Open, FileAccess.Read, FileShare.None, chunk, FileOptions.SequentialScan); BinaryReader binReader = new BinaryReader(stream); fileLength = stream.Length; // Set Position to the beginning of the stream. binReader.BaseStream.Position = 0; byte[] fileContents = new byte[chunk]; // Read File from Buffer while (limit < fileLength) { fileContents = binReader.ReadBytes(chunk); // the next 2 lines attempt to writ

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