Dicom.HL7.MLLP.Send C# (CSharp) Method

        public bool Send(string message)
        {
            #if SILVERLIGHT
            byte[] bytes = Encoding.UTF8.GetBytes(message);
            #else
            byte[] bytes = Encoding.ASCII.GetBytes(message);
            #endif
            _stream.Write(StartBlock, 0, StartBlock.Length);
            _stream.Write(bytes, 0, bytes.Length);
            _stream.Write(EndBlock, 0, EndBlock.Length);
            _stream.Flush();
            if (_version3) {
                byte[] rsp = new byte[4];
                if (_stream.Read(rsp, 0, 4) != 4)
                    return false;
                return rsp[1] == 0x06;
            }
            return true;
        }

        private void HL7ClientProc(object state)
        {
            Socket socket = (Socket)state;

            try {
                Interlocked.Increment(ref _clients);
                Debug.Log.Info("HL7 client connected: " + socket.RemoteEndPoint);

                NetworkStream stream = new NetworkStream(socket);
                MLLP          mllp   = new MLLP(stream, false, _encoding);

                while (socket.Connected && !_stop)
                {
                    if (!socket.Poll(100000, SelectMode.SelectRead))
                    {
                        continue;
                    }

                    try {
                        if (!stream.DataAvailable)
                        {
                            break;
                        }
                    } catch {
                        // http://msdn.microsoft.com/en-us/library/system.net.sockets.networkstream.dataavailable.aspx
                        // "If the remote host shuts down or closes the connection, DataAvailable may throw a SocketException."
                        break;
                    }

                    string hl7 = mllp.Receive();

                    if (OnReceiveMessage != null)
                    {
                        try {
                            HL7v2 req = HL7v2.Parse(hl7);
                            HL7v2 rsp = OnReceiveMessage(mllp, req, socket);
                            if (rsp != null)
                            {
                                mllp.Send(rsp.ToString());
                            }
                        } catch (Exception ex) {
                            Debug.Log.Error("Error processing HL7 message: " + ex.ToString());
                        }
                    }
                }

                Debug.Log.Info("HL7 client closed: " + socket.RemoteEndPoint);

                try {
                    socket.Close();
                } catch {
                }
            } catch {
                Debug.Log.Info("HL7 client closed on error");
            } finally {
                Interlocked.Decrement(ref _clients);
            }
        }