✅ How To Style ScrollBar Avalonia

<Style Selector="ScrollViewer.CreateUserScroll">
    <Setter Property="Background" Value="Transparent" />
    <Setter Property="Margin" Value="10" />
</Style>

<Style Selector="ScrollBar">
    <Setter Property="Background" Value="{DynamicResource ButtonSecondaryNight}" />
    <Setter Property="Foreground" Value="{DynamicResource TextColorNight}" />
    <Setter Property="BorderBrush" Value="{DynamicResource ButtonPrimaryNight}" />
    <Setter Property="BorderThickness" Value="2" />
    <Setter Property="Padding" Value="20" />
</Style>