Styles in Avalonia are used to share property settings between controls. The Avalonia styling system can be thought of as a mix of CSS styling and WPF/UWP styling. At its most basic, a style consists of a selector and a collection of setters.
The following style selects any
h1style class and sets its font size to 24 point and font weight to bold:
<Setter Property="FontSize" Value="24"/>
<Setter Property="FontWeight" Value="Bold"/>
<TextBlock Classes="h1">I'm a Heading!</TextBlock>