WPF rectangle - round just top corners

How can I have just the top corners rounded for a WPF rectangle?

I created a border and set the CornerRadius property and inside the border I've added my rectangle, but it doesn't work, the rectangle is not rounded.

<Border BorderThickness="1" CornerRadius="50,50,0,0" BorderBrush="Black">
    <Rectangle Fill="#FF5A9AE0" Stretch="UniformToFill" ClipToBounds="True"/>
</Border>

WPF rectangle - round just top corners

4 Answers