线程池类错误，求高人

[jiaoshoulee]

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net.Sockets;
using System.Threading;
using System.Net;
using System.Windows.Forms;


namespace serverchat
{
    public class Receiver
    {
        Socket _socket = null;
        NetworkStream _stream = null;
        int _index;
        Thread _thread = null;
        bool _isFree = true;

        #region 属性
        public Socket Socket
        {
            get { return _socket; }
            set { _socket = value; }
        }

        public NetworkStream Stream
        {
            get { return _stream; }
            set { _stream = value; }
        }

        public int Index
        {
            get { return _index; }
            set { _index = value; }
        }

        public Thread Thread
        {
            get { return _thread; }
            set { _thread = value; }
        }

        public bool IsFree
        {
            get { return _isFree; }
            set { _isFree = value; }
        }
        #endregion

        //构造方法
        public Receiver()
        {
            this.Thread = new Thread(new ThreadStart(readData));
            this.Thread.Start();

        }

        //激活此线程
        public void active(Socket socket, int index)
        {
            this.IsFree = false;
            this.Socket = socket;
            this.Index = index;
            this.Stream = new NetworkStream(this.Socket);
            this.Thread.Resume();
        }

        //读取数据
        public void readData()
        {
            lock (this)
            {
                byte[] by=new byte[1024];
                int acture = 0;
                string content = null;
                 while (true)
                 {
                     try
                     {
                        if (this.IsFree)
                        {
                            this.Thread.Suspend();
                        }
                        else
                        {
                            acture = this.Stream.Read(by, 0, by.Length);
                            content += Encoding.UTF8.GetString(by, 0, acture);

                            if (!this.Stream.DataAvailable)
                            {
                                
                                Pool.sendText(System.Text.Encoding.UTF8.GetBytes(content));
                                Pool.appendText(content);
                                 content = null;
                            }
                        }
                     }
                     catch (Exception e)
                     {
                         MessageBox.Show(e.Message);
                         this.IsFree = true;
                         this.Stream = null;
                         this.Socket = null;
                         throw;

                     }
                }
            }
        }
    }
}

此类当建立的socket断线了，则报错，报错后为什么线程没挂起来呢？

[greystar]

MessageBox.Show(e.Message);这个是有问题的.你不能在一个自由线程中处理与界面相关的事务,如修改控件的值.

当双方通信是,有一方退出时,你收到的数据为0,你要自己处理一下,如果为0,则认为对方退出,你要关闭连接.