1  <Application xmlns="https://github.com/avaloniaui"
 2               xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 3               x:Class="Shell.App"
 4               RequestedThemeVariant="Default">
 5               <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->
 6  
 7      <Application.Styles>
 8          <FluentTheme />
 9      </Application.Styles>
10  </Application>