maui-linux/Xamarin.Forms.Xaml.UnitTests/InlineCSS.xaml

<?xml version="1.0" encoding="UTF-8" ?>
<ContentPage 
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    x:Class="Xamarin.Forms.Xaml.UnitTests.InlineCSS">
    <ContentPage.Resources>
        <StyleSheet>
            <![CDATA[
* {
    background-color: green;
}
label {
    color: pink;
    background-color: initial;
}
            ]]>
        </StyleSheet>
    </ContentPage.Resources>
    <StackLayout x:Name="stack">
        <Label x:Name="label"/>
        <Button x:Name="button"/>
    </StackLayout>
</ContentPage>