Network C#

/*
C# Network Programming 
by Richard Blum
Publisher: Sybex 
ISBN: 0782141765
*/
using System;
using System.Collections;
using System.Net;
using System.Net.Sockets;
using System.Text;
public class SelectTcpClient
{
   public static void Main()
   {
      Socket sock = new Socket(AddressFamily.InterNetwork,
                        SocketType.Stream, ProtocolType.Tcp);
      IPEndPoint iep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 9050);
      byte[] data = new byte[1024];
      string stringData;
      int recv;
      sock.Connect(iep);
      Console.WriteLine("Connected to server");
      recv = sock.Receive(data);
      stringData = Encoding.ASCII.GetString(data, 0, recv);
      Console.WriteLine("Received: {0}", stringData);
      while(true)
      {
         stringData = Console.ReadLine();
         if (stringData == "exit")
            break;
         data = Encoding.ASCII.GetBytes(stringData);
         sock.Send(data, data.Length, SocketFlags.None);
         data = new byte[1024];
         recv = sock.Receive(data);
         stringData = Encoding.ASCII.GetString(data, 0, recv);
         Console.WriteLine("Received: {0}", stringData);
      }
      sock.Close();
   }
}