TcpClient.GetStream-Methode

        TcpClient tcpClient = new TcpClient ();

        // Uses the GetStream public method to return the NetworkStream.
        NetworkStream netStream = tcpClient.GetStream ();

        if (netStream.CanWrite)
        {
            Byte[] sendBytes = Encoding.UTF8.GetBytes ("Is anybody there?");
            netStream.Write (sendBytes, 0, sendBytes.Length);
        }
        else
        {
            Console.WriteLine ("You cannot write data to this stream.");
            tcpClient.Close ();

            // Closing the tcpClient instance does not close the network stream.
            netStream.Close ();
            return;
        }

        if (netStream.CanRead)
        {
            // Reads NetworkStream into a byte buffer.
            byte[] bytes = new byte[tcpClient.ReceiveBufferSize];

            // Read can return anything from 0 to numBytesToRead. 
            // This method blocks until at least one byte is read.
            netStream.Read (bytes, 0, (int)tcpClient.ReceiveBufferSize);

            // Returns the data received from the host to the console.
            string returndata = Encoding.UTF8.GetString (bytes);

            Console.WriteLine ("This is what the host returned to you: " + returndata);

        }
        else
        {
            Console.WriteLine ("You cannot read data from this stream.");
            tcpClient.Close ();

            // Closing the tcpClient instance does not close the network stream.
            netStream.Close ();
            return;
        }
        netStream.Close();