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How to make AppBarButton have round corner with style
AppBarButton
has CornerRadius property, you could give a available CornerRadius value for setting round corner for AppBarButton
<Style TargetType="AppBarButton">
<Setter Property="CornerRadius" Value="10"/>
</Style>
Update
Please delete PointerDownThemeAnimation
from PointerOver and Pressed VisualState, And add CornerRadius property for RootGrid
<Grid x:Name="RootGrid" CornerRadius="{TemplateBinding CornerRadius}" >
Usage
<AppBarButton CornerRadius="10" Style="{StaticResource AppBarButtonCustomStyle}" Label="Test" Icon="Accept"/>
Thank you.
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