Socket Programming In C#

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class Server
{
	public static void Main() {
		StartServer();
	}
	public static void StartServer() {
        IPHostEntry host = Dns.GetHostEntry("localhost");
        IPAddress ipAddress = host.AddressList[0];
        IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000);
        try {
            Socket listener = new Socket(ipAddress.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
            listener.Bind(localEndPoint);
            listener.Listen(10);
            Console.WriteLine("Waiting for a connection...");
            Socket handler = listener.Accept();
            string data = null;
            byte[] bytes = null;
            while (true) {
                bytes = new byte[1024];
                int bytesRec = handler.Receive(bytes);
                data += Encoding.ASCII.GetString(bytes, 0, bytesRec);
                if (data.IndexOf("<EOF>") > -1) {
                    break;
                }
            }
            Console.WriteLine("Text received : {0}", data);
            byte[] msg = Encoding.ASCII.GetBytes(data);
            handler.Send(msg);
            handler.Shutdown(SocketShutdown.Both);
            handler.Close();
        } catch (Exception e) {
            Console.WriteLine(e.ToString());
        }
        Console.WriteLine("\n Press any key to continue...");
        Console.ReadKey();
    }
}

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class Client
{
	public static void Main()
	{
           StartClient();
	}
    public static void StartClient()
    {
        byte[] bytes = new byte[1024];
        try {
            IPHostEntry host = Dns.GetHostEntry("localhost");
            IPAddress ipAddress = host.AddressList[0];
            IPEndPoint remoteEP = new IPEndPoint(ipAddress, 11000);
            Socket sender = new Socket(ipAddress.AddressFamily,
                SocketType.Stream, ProtocolType.Tcp);
            try {
                sender.Connect(remoteEP);
                Console.WriteLine("Socket connected to {0}",
                    sender.RemoteEndPoint.ToString());
                byte[] msg = Encoding.ASCII.GetBytes("This is a test<EOF>");
                int bytesSent = sender.Send(msg);
                int bytesRec = sender.Receive(bytes);
                Console.WriteLine("Echoed test = {0}",
                    Encoding.ASCII.GetString(bytes, 0, bytesRec));
                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());
        }
    }
}