聊天程序

Question

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace ChatServer
{
    public partial class Form1 : Form
    {
        private IPAddress HostIP = IPAddress.Parse("127.0.0.1");
        private IPEndPoint ChatServer;
        private Socket ChatSocket;
        private bool flag = true;
        private Socket AcceptedSocket;
        public Form1()
        {
            InitializeComponent();
        }        private void button1_Click(object sender, EventArgs e)
        {
            HostIP = IPAddress.Parse("127.0.0.1");
            try
            {
                ChatServer = new IPEndPoint(HostIP, Int32.Parse("8080"));
                ChatSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                ChatSocket.Bind(ChatServer);
                ChatSocket.Listen(50);
                statusBar.Text = textBox1.Text + " has logoned on.Now begin to listen...";
                AcceptedSocket = ChatSocket.Accept();
                Thread thread = new Thread(new ThreadStart(ChatProcess));
                thread.Start();            }
            catch (Exception ee)
            { statusBar.Text = ee.Message; }        }
        private void ChatProcess()
        {
            if (AcceptedSocket.Connected)
            {
                statusBar.Text = "Ready for the chatting!";
                while (flag)
                {
                    Byte[] ReceivedByte = new Byte[64];
                    AcceptedSocket.Receive(ReceivedByte, ReceivedByte.Length, 0);
                    string ReceivedStr = System.Text.Encoding.BigEndianUnicode.GetString(ReceivedByte);
                    textBox2.AppendText(ReceivedStr + "\r\n");                }
            }
        }
    }
}--------------------------------
每次执行到AcceptedSocket = ChatSocket.Accept();这条语句的时候程序就死掉了