RoundCornersEffectUsageExample.xaml

<ContentPage ...
    xmlns:effects="clr-namespace:<project>.Effects;assembly=<project>"
    BackgroundColor="PaleTurquoise">

    <ContentPage.Resources>
        <ResourceDictionary>
            <x:Int32 x:Key="SmallCornerRadius">4</x:Int32>
            <x:Int32 x:Key="MediumCornerRadius">8</x:Int32>
            <x:Int32 x:Key="LargeCornerRadius">16</x:Int32>
        </ResourceDictionary>
    </ContentPage.Resources>
    
    <StackLayout ...
        BackgroundColor="WhiteSmoke"
        effects:RoundCornersEffect.CornerRadius="48">

        <BoxView ...
            BackgroundColor="Navy"
            effects:RoundCornersEffect.CornerRadius="{StaticResource LargeCornerRadius}" />

        <Label ...
            TextColor="White"
            BackgroundColor="DeepSkyBlue"
            effects:RoundCornersEffect.CornerRadius="{StaticResource SmallCornerRadius}" />

        <ContentView ...
            effects:RoundCornersEffect.CornerRadius="{StaticResource MediumCornerRadius}">

            <Image ...
                Source="..." />

        </ContentView>

    </StackLayout>
</ContentPage>