Use DropShadowEffect instead of DropShadowBitmapEffect . Raster effects are outdated. But be careful with the effects. Use the WPF Performance Suite to test the effectiveness of the behavior of the effects used - I have already seen very bad performance consequences using the effect classes. See here for an example.
Another option is to decorate the Border shortcut. If you set the thickness accordingly, it will look like a shadow:
<Border BorderThickness="1,1,20,20" BorderBrush="Black"> <Label /> </Border>
(I did not see what the above border looks like. You need to play a little to get a good result).
HCL
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