They simply stacking TextBlocks and adjusting their margins and colors to simulate shadow effect. Something like:
<Grid VerticalAlignment="Center" HorizontalAlignment="Center"> <TextBlock FontSize="50" Text="My Marvelous Shadow" /> <TextBlock FontSize="50" Text="My Marvelous Shadow" Margin="6 6 0 0" Opacity="0.1" /> <TextBlock FontSize="50" Text="My Marvelous Shadow" Margin="5 5 0 0" Opacity="0.1" /> <TextBlock FontSize="50" Text="My Marvelous Shadow" Margin="4 4 0 0" Opacity="0.1" /> <TextBlock FontSize="50" Text="My Marvelous Shadow" Margin="3 3 0 0" Opacity="0.1" /> </Grid>
It's not all-around, but you should get the idea.
P.S. It's sometimes helpful to dive into Program Files\WindowsApps and look inside some apps.