Parent and child timelines with default HoldEnd FillBehavior

   
             

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      HorizontalAlignment="Stretch" VerticalAlignment="Stretch">

    <Ellipse Name="myEllipse" Height="100" Fill="Red">
      <Ellipse.Triggers>
        <EventTrigger RoutedEvent="Ellipse.Loaded">
          <BeginStoryboard>
            <Storyboard>
                
                <ParallelTimeline BeginTime="0:0:2">
                  <DoubleAnimation From="10" To="300" Duration="0:0:5"
                                   Storyboard.TargetProperty="(Ellipse.Width)" />
                </ParallelTimeline>
                

            </Storyboard>
          </BeginStoryboard>
        </EventTrigger>
      </Ellipse.Triggers>
    </Ellipse>

</Page>