Avalonia/samples/IntegrationTestApp/Pages/ScrollBarPage.axaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="IntegrationTestApp.Pages.ScrollBarPage">
  <ScrollBar Name="MyScrollBar" Orientation="Horizontal" AllowAutoHide="False" Width="200" Height="30" Value="20"/>
</UserControl>