The following example displays a @Rectangle with a drop shadow.
```xml
	<Rectangle Margin="40" Color="#9b59b6">
	    <DropShadow Size="10" Distance="3" Spread="0.05" Color="#0008" Angle="90" />
	</Rectangle>
```
Or in its simplest form:
```xml
	<Rectangle Margin="40" Color="#fff">
	    <DropShadow />
	</Rectangle>
```