Creating an Animated ContentControl

<ResourceDictionary
	xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
	xmlns:local="clr-namespace:AnimatedContentControlSample">


	<Style TargetType="{x:Type local:AnimatedContentControl}">
		<Setter Property="Template">
			<Setter.Value>
				<ControlTemplate TargetType="{x:Type local:AnimatedContentControl}">
					<Grid>
						<ContentPresenter Content="{TemplateBinding Content}" x:Name="PART_MainContent" />
						<Rectangle x:Name="PART_PaintArea" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" />
					</Grid>
				</ControlTemplate>
			</Setter.Value>
		</Setter>
	</Style>
</ResourceDictionary>