WPF中使用定时器 DispatcherTimer 干TCP连接中的心跳 HeartBeat

using System.Windows.Threading;

public partial class MainWindow : Window
{
　　DispatcherTimer timerHeartBeat = new DispatcherTimer();

   public MainWindow()
   {
       timerHeartBeat.Tick += SendHeartBeatToServer; 
       timerHeartBeat.Interval = TimeSpan.FromSeconds(60 * 5); 
       timerHeartBeat.Start();
   }

   private void SendHeartBeatToServer(object sender,EventArgs e)
   {
      string strToSend = "{CMD:'99999'}";
      SendMsg(strToSend);
   }
}