title: DispatcherTimer loses time while I'm dragging its Window
body: <p>I'm trying to build a simple timeout with C# WPF.</p>
  
  <pre><code>public void start(){
      answerTimer = new DispatcherTimer();
      answerTimer.Tick += new EventHandler(answerTimer_Tick);
      answerTimer.Interval = new TimeSpan(0,0,0,0,10);
      answerTimer.Start();
  }
  
  private void answerTimer_Tick(object sender, EventArgs e)
  {
      ...
  }
  </code></pre>
  
  <p>This works but if I move the Window dragging it, the countdown stops and restart when I drop the Window....  how to avoid it?
  Thanks.</p>