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    x:ClassModifier="internal"
    xmlns="https://github.com/avaloniaui"
    xmlns:sys="using:System"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <sys:TimeSpan x:Key="ButtonHoverAnimationDuration">0.25</sys:TimeSpan>
    <sys:Double x:Key="TopBorderHeight">28</sys:Double>
    <sys:Double x:Key="ThemeDisabledOpacity">0.5</sys:Double>
    <sys:Double x:Key="ScrollBarThickness">18</sys:Double>
</ResourceDictionary>