[C#] Serveur Socket, multiples connexions

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




namespace ConsoleApplication2 
{ 
    class Program 
    { 




        public Program() 
        { 


            while (true) 
            { 
                string data; 
                IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050); 

                Socket newsock = new Socket(AddressFamily.InterNetwork, 
                                SocketType.Stream, ProtocolType.Tcp); 
                newsock.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true); 
                newsock.Bind(ipep); 
                newsock.Listen(20); 
                Console.WriteLine("Waiting for a client..."); 

                Socket client = newsock.Accept(); 
                IPEndPoint newclient = (IPEndPoint)client.RemoteEndPoint; 
                Console.WriteLine("Connected with {0} at port {1}", 
                                newclient.Address, newclient.Port); 

                NetworkStream ns = new NetworkStream(client); 
                StreamReader sr = new StreamReader(ns); 
                StreamWriter sw = new StreamWriter(ns); 

                string welcome = "Welcome to my test server"; 
                sw.WriteLine(welcome); 
                sw.Flush(); 

                while (true) 
                { 
                    try 
                    { 
                        data = sr.ReadLine(); 
                    } 
                    catch (IOException) 
                    { 
                        break; 
                    } 

                    Console.WriteLine(data); 
                    sw.WriteLine(data); 
                    sw.Flush(); 

                } 
                Console.WriteLine("Disconnected from {0}", newclient.Address); 
               
                
                sw.Close(); 
                sr.Close(); 
                ns.Close();  
            //  newsock.Disconnect(true);                              // j'ai essayé ça mais ça ne  marche pas 
            //newsock.Shutdown(SocketShutdown.Both);n 
            } 
        } 

        public static void Main(String[] argv) 
        { 
            Program sts = new Program(); 
        }