title: Binding animation duration to slider
body: <p>On My <strong>MainPage</strong> I have</p>
  
  <pre><code>&lt;DoubleAnimation Completed="DoubleAnimation_Completed_1" 
              Storyboard.TargetName="factImage"
              Storyboard.TargetProperty="Opacity"
              From="0.0" To="1.0" Duration="0:0:0.3"
              AutoReverse="False"/&gt;
  </code></pre>
  
  <p>Instead of hardcoding <em>Duration="0:0:0.3"</em> , I want to bind it to a slider on <strong>Setting</strong> page.</p>