Avalonia/samples/ControlCatalog/Pages/SliderPage.xaml

<UserControl xmlns="https://github.com/avaloniaui">
  <StackPanel Orientation="Vertical" Spacing="4">
    <TextBlock Classes="h1">Slider</TextBlock>
    <TextBlock Classes="h2">A control that lets the user select from a range of values by moving a Thumb control along a Track.</TextBlock>

    <StackPanel Orientation="Horizontal" HorizontalAlignment="Center" Margin="0 16 0 0" Spacing="16">
      <Slider Value="0"
              Minimum="0"
              Maximum="100"
              Width="300"/>
      <Slider Value="0"
              Minimum="0"
              Maximum="100"
              Orientation="Vertical"
              IsSnapToTickEnabled="True"
              TickFrequency="10"
              Height="300"/>
    </StackPanel>

  </StackPanel>
</UserControl>