socket connections

Code:

private Socket sckTCD = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

This creates my new socket object.
I'm able to send via the socket and also receive data.
But I can only receive data when I request it.

My app does not listen on a port for incoming requests.

Is this only possible via the TcpListener?

If so, how can I prevent the following:

Code:

TcpClient myTcpClient = myTcpListener.AcceptTcpClient();

My app is waiting for a connection and holds back all other procedures until someone has connected.

Any ideas?

thx!