向原来好好的C#程序中加一段异步套接字服务器端代码，结果程序老自己退出，该怎么办？
代码如下：
public static StateObject state; public static IPAddress ipAddress = IPAddress.Parse("0.0.0.0"); public static IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 2012); public static Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { serverSocket.Bind(localEndPoint); serverSocket.Listen(100); serverSocket.BeginAccept(new AsyncCallback(AcceptCallback), serverSocket); MyFlowForm = new FlowMon(); Application.Run(MyFlowForm); } public static void AcceptCallback(IAsyncResult ar) { Socket serverSocket = (Socket)ar.AsyncState; Socket clientSocket = serverSocket.EndAccept(ar); state = new StateObject(); state.workSocket = clientSocket; Send("连接服务器成功"); clientSocket.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state); } public static void ReadCallback(IAsyncResult ar) { StateObject state = (StateObject)ar.AsyncState; Socket clientSocket = state.workSocket; int bytesRead = clientSocket.EndReceive(ar); if (bytesRead > 0) { String str = Encoding.Unicode.GetString(state.buffer, 0, bytesRead); } clientSocket.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state); } private static void Send(String data) { byte[] byteData = Encoding.Unicode.GetBytes(data); state.workSocket.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), state); } private static void SendCallback(IAsyncResult ar) { try { Socket clientSocket = (Socket)ar.AsyncState; int bytesSent = clientSocket.EndSend(ar); } catch (Exception e) { Console.WriteLine(e.ToString()); } } public class StateObject { public Socket workSocket = null; public const int BufferSize = 1024; public byte[] buffer = new byte[BufferSize]; }using System;using System.Collections.Generic;using System.Text;using System.Net;using System.Net.Sockets;using System.Windows.Forms;using System.Threading;namespace Flowfairy{ class FlowSocket { public StateObject state; public IPAddress ipAddress; public IPEndPoint localEndPoint; public Socket serverSocket; public void ListenFlow() { ipAddress = IPAddress.Parse("0.0.0.0"); localEndPoint = new IPEndPoint(ipAddress, 2012); this.serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//建立socket serverSocket.Bind(localEndPoint);//将套接字绑定到用于TCP通信的本地0.0.0.0地址和2012端口上 serverSocket.Listen(100);//设置套接字处于监听状态 serverSocket.BeginAccept(new AsyncCallback(AcceptCallback), serverSocket); //开始接受新连接，获取将处理链接的serverSocket,并将Socket提交给将处理请求的AcceptCallback线程{ } public void AcceptCallback(IAsyncResult ar)//启动异步接收数据 { try { Socket serverSocket = (Socket)ar.AsyncState; Socket clientSocket = serverSocket.EndAccept(ar); state = new StateObject(); state.workSocket = clientSocket; Send("connected"); this.serverSocket.BeginAccept(new AsyncCallback(AcceptCallback), this.serverSocket); clientSocket.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state); } catch (Exception e) { MessageBox.Show(e.ToString()); } } public void ReadCallback(IAsyncResult ar) { try { StateObject state = (StateObject)ar.AsyncState; Socket clientSocket = state.workSocket;//从异步状态对象中获得State对象和客户套接字 int bytesRead = clientSocket.EndReceive(ar);//从客户套接字读取数据 if (bytesRead > 0) { String str = Encoding.Unicode.GetString(state.buffer, 0, bytesRead); } Thread.Sleep(1); clientSocket.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReadCallback), state);//继续接收 } catch (Exception e) { MessageBox.Show(e.ToString()); } } private void Send(String data)//启动异步发送数据，将"connected"编码后发送给客户端 { byte[] byteData = Encoding.UTF8.GetBytes(data); state.workSocket.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), state.workSocket); } private void SendCallback(IAsyncResult ar) { try { Socket clientSocket = (Socket)ar.AsyncState; int bytesSent = clientSocket.EndSend(ar);//完成发送 } catch (Exception e) { MessageBox.Show(e.ToString()); } } } public class StateObject { public Socket workSocket = null; public const int BufferSize = 1024; public byte[] buffer = new byte[BufferSize]; }}