Avalonia/samples/ControlCatalog/Pages/NavigationPage/NavigationPagePassDataPage.xaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="ControlCatalog.Pages.NavigationPagePassDataPage">
  <DockPanel>
    <ScrollViewer DockPanel.Dock="Right" Width="280">
      <StackPanel Margin="12" Spacing="16">
        <TextBlock Text="Configuration" FontSize="16" FontWeight="SemiBold"
                   Foreground="{DynamicResource SystemControlHighlightAccentBrush}" />

        <!-- Pass Method -->
        <TextBlock Text="Pass Method" FontSize="13" FontWeight="SemiBold" />
        <ComboBox x:Name="MethodCombo"
                  SelectedIndex="0"
                  SelectionChanged="OnMethodChanged"
                  HorizontalAlignment="Stretch">
          <ComboBoxItem Content="Constructor" />
          <ComboBoxItem Content="DataContext" />
        </ComboBox>

        <Separator />
        <TextBlock Text="How It Works" FontSize="13" FontWeight="SemiBold" />
        <TextBlock x:Name="MethodDescription"
                   Text="Data is passed as a constructor argument to the detail page. The page stores the contact and displays its properties directly."
                   TextWrapping="Wrap" FontSize="12" Opacity="0.7" />

        <Separator />

        <!-- Navigation Log -->
        <TextBlock Text="Navigation Log" FontSize="13" FontWeight="SemiBold" />
        <Border Background="{DynamicResource SystemControlBackgroundBaseLowBrush}"
                CornerRadius="4" Padding="8" MaxHeight="200">
          <ScrollViewer VerticalScrollBarVisibility="Auto">
            <TextBlock x:Name="NavigationLog"
                       FontSize="11" Opacity="0.8" TextWrapping="Wrap" />
          </ScrollViewer>
        </Border>

        <Separator />

        <Button Content="Pop"
                HorizontalAlignment="Stretch"
                Click="OnPop" />
      </StackPanel>
    </ScrollViewer>

    <Border DockPanel.Dock="Right" Width="1" Background="{DynamicResource SystemControlForegroundBaseMediumLowBrush}" />

    <Border Margin="12"
            BorderBrush="{DynamicResource SystemControlForegroundBaseMediumLowBrush}"
            BorderThickness="1"
            CornerRadius="6"
            ClipToBounds="True">
      <NavigationPage x:Name="DemoNav" />
    </Border>
  </DockPanel>
</UserControl>