title: How to prevent MouseDown event on a child control
body: <p>I have nested grids</p>
  
  <pre><code> &lt;Grid x:Name="Grid1"  MouseDown="Grid2_MouseUp"&gt;
      &lt;Grid x:Name="Grid2"&gt;
       &lt;/Grid&gt;
  &lt;/Grid&gt;
  </code></pre>
  
  <p>I want <code>MouseDown</code> event raise only when clicking on <code>Grid1</code>.</p>
  
  <p>How to prevent <code>MouseDown</code> from raising when <code>Grid2</code> is clicked?</p>