title: Keep an ellipse's height and width scaled
body: <p>I just want to have a few ellipses that no matter how the container changes, the height and width should always be the same. I found a solution but it's too slow, I'll post it here to illustrate what I want to do. Let me know if you have any idea on a good way to achieve this.</p>
  
  <pre><code>&lt;Grid&gt;
      &lt;Ellipse Width="Auto"
               Height="{Binding RelativeSource={RelativeSource Self}, Path=ActualWidth}"
               Stroke="Black"
               StrokeThickness="2" /&gt;
  &lt;/Grid&gt;
  </code></pre>
  
  <p>Thanks! =)</p>