Someone

Client: 
                System.Net.IPHostEntry hostInfo = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName());
                System.Net.IPAddress myIP = hostInfo.AddressList[0];
                System.Net.IPEndPoint myEP = new System.Net.IPEndPoint(myIP, 11000);
                mySocket.Connect(myEP);

Server:
            // Get the host IP info
            IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());
            // Grab me an IP...
            IPAddress ipAddress = ipHostInfo.AddressList[0];
            // Set the endpoint
            IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000);
            

            // Make a new TCP/IP socket...
            Socket myListener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            // Bind socket to endpoint... 
            try
            {
                myListener.Bind(localEndPoint);
                myListener.Listen(100);