title: BeginStorybard on DataTrigger WPF
body: <p>I am using a transition animation for when my application boots up.</p>
  
  <pre><code>&lt;Storyboard x:Key="InTransition"&gt;
              &lt;DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="ContentGrid" Storyboard.TargetProperty="(UIElement.Opacity)"&gt;
                  &lt;SplineDoubleKeyFrame KeyTime="00:00:00" Value="0"/&gt;
                  &lt;SplineDoubleKeyFrame KeyTime="00:00:05" Value="0"/&gt;
                  &lt;SplineDoubleKeyFrame KeyTime="00:00:05.5000000" Value="1"/&gt;
              &lt;/DoubleAnimationUsingKeyFrames&gt;
              &lt;DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="ContentGrid" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)"&gt;
                  &lt;SplineDoubleKeyFrame KeyTime="00:00:00" Value="-72"/&gt;
                  &lt;SplineDoubleKeyFrame KeyTime="00:00:05" Value="-157"/&gt;
                  &lt;SplineDoubleKeyFrame KeySpline="0.5,0,0.5,1" KeyTime="00:00:05.5000000" Value="0"/&gt;
              &lt;/DoubleAnimationUsingKeyFrames&gt;
  &lt;/Storyboard&gt;
  </code></pre>
  
  <p>This works well if I start it as an <code>EventTrigger RoutedEvent="FrameworkElement.Loaded"</code> But  I want to bind it to a property on my viewModel called <code>IsInitialized</code>. Problem is <code>Windows.Triggers</code> doesn't allow <code>DataTrigger</code>. </p>
  
  <p>How can I do that? </p>