title: 2 TcpClient on same machine and port
body: <p>I'm a beginner with the C# and network programming and I have a question:
  - I have a <code>TcpListner</code> and 2 <code>TcpClient</code> on port 100 they all run on the same machine
  so does the second client work? or does it give an error - port already in use?</p>