Avalonia/samples/ControlCatalog/Pages/ProgressBarPage.xaml

<UserControl xmlns="https://github.com/avaloniaui">
  <StackPanel Orientation="Vertical" Spacing="4">
    <TextBlock Classes="h1">ProgressBar</TextBlock>
    <TextBlock Classes="h2">A progress bar control</TextBlock>

    <StackPanel>
      <StackPanel Orientation="Horizontal"
                  Margin="0,16,0,0"
                  HorizontalAlignment="Center"
                  Spacing="16">
        <StackPanel Spacing="16">
          <ProgressBar Value="{Binding #hprogress.Value}" />
          <ProgressBar IsIndeterminate="True"/>
        </StackPanel>
        <ProgressBar Value="{Binding #vprogress.Value}" Orientation="Vertical" />
        <ProgressBar Orientation="Vertical" IsIndeterminate="True" />
      </StackPanel>
      <StackPanel Margin="16">
        <Slider Name="hprogress" Maximum="100" Value="40"/>
        <Slider Name="vprogress" Maximum="100" Value="60"/>
      </StackPanel>
    </StackPanel>
  </StackPanel>
</UserControl>