当第一次运行线程关闭后，第二次再次运行此线程会直接运行MessageBox.Show("receivecommand终止");
各位能帮忙解答吗？在下感激不尽，求各位大神帮忙，在下叩首谢恩了
代码如下：

private void Receivecommand()//???
        {
            UdpClient local2 =Listencommandclient;//监控接受端口
             Byte[] listendata=new byte[1024];
                IPEndPoint remote2 = new IPEndPoint(IPAddress.Parse(chatIp), commamdNo);//监控发送端口
                try
                {
                    while (true)
                    {
                       listendata = local2.Receive(ref remote2);
                        if (Encoding.Unicode.GetString(listendata, 0, listendata.Length) == "stop")
                        {
                            connectYesNo = false;                          
                            chatIp = null;
                            break;
                        }
                    }
                    //local2.Close();
                }
                catch (Exception ee)
                {
                    local2.Close();
                }
                local2.Close();
                Thread.Sleep(100);
            MessageBox.Show("receivecommand终止");
         
        }