Use NetworkStream to read and write to a server : NetworkStream : Network C# Examples

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

class  MainClass
{
      public  static  void  Main()
      {
            IPEndPoint  ip  =  new  IPEndPoint(IPAddress.Parse("127.0.0.1"),  9999);

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

            try
            {
                  server.Connect(ip);
            }  catch  (SocketException  e){
                  Console.WriteLine(e.ToString());
                  return;
            }

            NetworkStream  ns  =  new  NetworkStream(server);

            while(true)
            {
                  byte[]  data  =  new  byte[1024];
                  string  input  =  Console.ReadLine();
                  if  (ns.CanWrite){
                        ns.Write(Encoding.ASCII.GetBytes(input),  0,  input.Length);
                        ns.Flush();
                  }

                  int  receivedDataLength  =  ns.Read(data,  0,  data.Length);
                  string  stringData  =  Encoding.ASCII.GetString(data,  0,  receivedDataLength);
                  Console.WriteLine(stringData);
            }

            ns.Close();
            server.Shutdown(SocketShutdown.Both);
            server.Close();
      }
}