.NET NamedPipeServerStream problem - consecutive Reads return the same data

Answer 1

The first thing I'd try changing is here:

            do
            {
                // !!! problematic function call here !!!
                int BytesRead = NPSS.Read(PipeDataBuffer, 0, PipeDataBuffer.Length);
                // !!!
                MessageStream.Write(PipeDataBuffer, 0, BytesRead);
                TotalBytesRead += BytesRead;
            } while (!NPSS.IsMessageComplete);

It doesn't check that BytesRead is +ve; now I would expect MessageStream.Write to explode if it was negative, but... either way; I would definitely check for an unexpected <=0 condition there.

Answer 2

All sorted, please ignore!

(Question has the solution details - TL;DR it wasn't a problem in NamedPipeServerStream.)