斷開連接時關閉客戶端套接字

我有監聽客戶端的服務器應用程序。讓我們的客戶端失去了互聯網連接，並失去與服務器的連接。斷開連接時關閉客戶端套接字

服務器自動檢查客戶端何時斷開連接？如果不是我怎麼能實現這樣的事情？

ServerSocket.cs：http://pastebin.com/erw4tzdp

Client.cs：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Net.Sockets; 

namespace jM2 
{ 
    class Client 
    { 
     private int clientConnectionID; 
     private Socket clientSocket; 
     private string clientIP; 
     private byte[] clientBuffer = new byte[1024]; 

     public Client(int connectionID, Socket connectionSocket) 
     { 
      clientConnectionID = connectionID; 
      clientSocket = connectionSocket; 
      clientIP = connectionSocket.RemoteEndPoint.ToString(); 
      clientSocket.BeginReceive(clientBuffer, 0, clientBuffer.Length, SocketFlags.None, new AsyncCallback(dataArrival), null); 
     } 
     public void Disconnect() 
     { 
      clientSocket.Close(); 
     } 
     private void dataArrival(IAsyncResult iar) 
     { 
      int bytesReceived = clientSocket.EndReceive(iar); 
      clientSocket.BeginReceive(clientBuffer, 0, clientBuffer.Length, SocketFlags.None, new AsyncCallback(dataArrival), null); 
     } 
    } 
}

來源

2011-02-18 jM2.me