Avalonia/samples/IntegrationTestApp/Pages/SliderPage.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.SliderPage">
  <DockPanel>
    <DockPanel DockPanel.Dock="Top">
      <TextBox Name="HorizontalSliderValue"
               DockPanel.Dock="Right"
               Text="{Binding #HorizontalSlider.Value, Mode=OneWay, StringFormat=\{0:0\}}"
               VerticalAlignment="Top"/>
      <Slider Name="HorizontalSlider" Value="50"/>
    </DockPanel>
    <Button Name="ResetSliders" Click="ResetSliders_Click">Reset</Button>
  </DockPanel>
</UserControl>