DropShadowPanel and border corner radius

Question

I want to make drop shadow effect with border control. I am using UWP toolkit.

<controls:DropShadowPanel x:Name="dspShadow"
                          BlurRadius="10"
                          ShadowOpacity="0.8"
                          OffsetX="0"
                          OffsetY="0"
                          Color="Black">
    <Border x:Name="borderMain" Background="Red" CornerRadius="10"/>
</controls:DropShadowPanel>

But it doesn't recognize corner radius, the result is like this:

And I need it to look like this:

Any ideas how to achieve this?

Answer 1

You need to mask it. Currently you can only get the mask from TextBlock, Shape and Image. In this case just replace the Border with a Rectangle.

<controls:DropShadowPanel x:Name="dspShadow"
                          BlurRadius="10"
                          OffsetX="0"
                          OffsetY="0"
                          ShadowOpacity="0.8"
                          Color="Black">
    <Rectangle Width="100"
               Height="48"
               Fill="Red"
               RadiusX="10"
               RadiusY="10" />
</controls:DropShadowPanel>