title: WPF Dispatcher timer tick freezes my application
body: <p>I've got a little problem using WPF Dispatcher Timer. On each timer tick my application freezes for a moment (until timer tick method finishes). This is my code:</p>
  
  <pre><code>private DispatcherTimer _Timer = new DispatcherTimer();
  
  _Timer.Tick += new EventHandler(_DoLoop);
  _Timer.Interval = TimeSpan.FromMilliseconds(1500);
  _Timer.Start();
  </code></pre>
  
  <p>Is there any way to avoid this and have my application run smoothly?</p>