C#2.0 TcpClient的线程中止问题？

我在一个工作线程中用NetworkStream定义stream.Read读取TcpClient接收到的数据,这个时候线程会停在这里不往下执行，所以我用stream.ReadTimeout = 1000;让他超时，这种方法在.net环境中可以正常退出，但是单独执行程序却不能退出，请高手指点！谢谢！
public void receive()
        {
            while (!bExit)
            {
                Byte[] data = new Byte[8192];
                try
                {
                    stream.ReadTimeout = 1000;
                    Int32 bytes = stream.Read(data, 0, data.Length);
                    // String to store the response ASCII representation.
                    String responseData = String.Empty;
                    responseData = System.Text.Encoding.Default.GetString(data, 0, bytes);
                    this.Invoke(myRData, responseData);
                }
                catch (IOException e1)
                {
                }
            }
            
        }private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            bExit = true;
            tcpRecv.Join();
            try
            {
                stream.Close();
                client.Close();
            }
            catch (Exception ee1)
            {
                MessageBox.Show(ee1.Message);
            }
        }