public NewUDP()
        {
            InitializeComponent();
            NewUDPSetting set = new NewUDPSetting();

            set.local_ip    = "0.0.0.0";
            set.romote_ip   = "0.0.0.0";
            set.local_port  = 0;
            set.romote_port = 0;
            try
            {
                set = (NewUDPSetting)FastData.SaveStatic.ReadBinF(Name);
            }
            catch (Exception exp)
            {
                MessageBox.Show(Name + ": " + exp.ToString());
            }
            _local_ip    = set.local_ip;
            _local_port  = set.local_port;
            _localIpep   = new IPEndPoint(IPAddress.Parse(_local_ip), _local_port); // 本机IP和监听端口号
            _udpclient   = new UdpClient(_localIpep);
            _romote_ip   = set.romote_ip;
            _romote_port = set.romote_port;
            _romoteIpep  = new IPEndPoint(IPAddress.Parse(_romote_ip), _romote_port);
        }
        private void button3_Click(object sender, EventArgs e)
        {
            NewUDPSetting set = new NewUDPSetting();

            set.local_ip    = textBox1.Text;
            set.local_port  = int.Parse(textBox3.Text);
            set.romote_ip   = textBox2.Text;
            set.romote_port = int.Parse(textBox4.Text);
            FastData.SaveStatic.SaveBinF(Name, set);
        }