Late to the party, guess your deadline passed by now, but...

I don't see anywhere in your code where you try to send data. Maybe do a tcpClient.Send.

Check the built in help for basic working examples.

I'm trying to write a Windows Service that connects to one server and multiple clients connect to it. Haven't got it down yet, but the starting code was taken from the help. This app was written and works fine in VB6, trying to port to .NET service. I agree that it was easier (faster) with the Winsock control. Gives me something to do, anyway.