System.Net.ProtocolViolationException: You must write ContentLength bytes to the request stream before calling [Begin]GetResponse

Question

I am getting the

\"System.Net.ProtocolViolationException: You must write ContentLength bytes to the request stream before calling [Begin]GetResponse\

Answer 1

Your code should work for .NET 2.0 From 4.0 and up you should close the stream after writing:

dataStream = Webrequest.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
datastream.Close();