using System;  

using System.Net;  

using System.Net.Sockets;  

using System.Text;  

public class SynchronousSocketClient {  

    public static void StartClient() {  

        // Data buffer for incoming data.  

        byte[] bytes = new byte[1024];  

        // Connect to a remote device.  

        try {  

            // Establish the remote endpoint for the socket.  

            // This example uses port 11000 on the local computer.  

            IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());  

            IPAddress ipAddress = ipHostInfo.AddressList[0];  

            IPEndPoint remoteEP = new IPEndPoint(ipAddress,11000);  

            // Create a TCP/IP  socket.  

            Socket sender = new Socket(ipAddress.AddressFamily,

                SocketType.Stream, ProtocolType.Tcp );  

            // Connect the socket to the remote endpoint. Catch any errors.  

            try {  

                sender.Connect(remoteEP);  

                Console.WriteLine("Socket connected to {0}",  

                    sender.RemoteEndPoint.ToString());  

                // Encode the data string into a byte array.  

                byte[] msg = Encoding.ASCII.GetBytes("This is a test<EOF>");  

                // Send the data through the socket.  

                int bytesSent = sender.Send(msg);  

                // Receive the response from the remote device.  

                int bytesRec = sender.Receive(bytes);  

                Console.WriteLine("Echoed test = {0}",  

                    Encoding.ASCII.GetString(bytes,0,bytesRec));  

                // Release the socket.  

                sender.Shutdown(SocketShutdown.Both);  

                sender.Close();  

            } catch (ArgumentNullException ane) {  

                Console.WriteLine("ArgumentNullException : {0}",ane.ToString());  

            } catch (SocketException se) {  

                Console.WriteLine("SocketException : {0}",se.ToString());  

            } catch (Exception e) {  

                Console.WriteLine("Unexpected exception : {0}", e.ToString());  

            }  

        } catch (Exception e) {  

            Console.WriteLine( e.ToString());  

        }  

    }  

    public static int Main(String[] args) {  

        StartClient();  

        return 0;  

    }  

}