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

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="ControlCatalog.Pages.NavigationPageEventsPage">
  <DockPanel>
    <ScrollViewer DockPanel.Dock="Right" Width="280">
      <StackPanel Margin="12" Spacing="16">
        <TextBlock Text="Configuration" FontSize="16" FontWeight="SemiBold"
                   Foreground="{DynamicResource SystemControlHighlightAccentBrush}" />
        <TextBlock Text="Navigation" FontSize="13" FontWeight="SemiBold" />
        <StackPanel Spacing="6">
          <Button Content="Push Page"
                  HorizontalAlignment="Stretch"
                  Click="OnPush" />
          <Button Content="Pop"
                  HorizontalAlignment="Stretch"
                  Click="OnPop" />
          <Button Content="Pop to Root"
                  HorizontalAlignment="Stretch"
                  Click="OnPopToRoot" />
          <Button Content="Insert Page"
                  HorizontalAlignment="Stretch"
                  Click="OnInsertPage" />
          <Button Content="Remove Page"
                  HorizontalAlignment="Stretch"
                  Click="OnRemovePage" />
        </StackPanel>

        <TextBlock Text="Modal" FontSize="13" FontWeight="SemiBold" />
        <StackPanel Spacing="6">
          <Button Content="Push Modal"
                  HorizontalAlignment="Stretch"
                  Click="OnPushModal" />
          <Button Content="Pop Modal"
                  HorizontalAlignment="Stretch"
                  Click="OnPopModal" />
        </StackPanel>

        <Separator />

        <!-- Event Log -->
        <DockPanel>
          <TextBlock DockPanel.Dock="Left" Text="Event Log" FontSize="13" FontWeight="SemiBold"
                     VerticalAlignment="Center" />
          <Button DockPanel.Dock="Right" Content="Clear" Click="OnClearLog"
                  HorizontalAlignment="Right" Padding="8,2" FontSize="11" />
        </DockPanel>
        <Border Background="{DynamicResource SystemControlBackgroundBaseLowBrush}"
                CornerRadius="4" Padding="8" MinHeight="120" MaxHeight="250">
          <ScrollViewer VerticalScrollBarVisibility="Auto">
            <StackPanel x:Name="LogPanel" Spacing="1" />
          </ScrollViewer>
        </Border>

        <Separator />

        <!-- IsNavigating indicator -->
        <TextBlock Text="Status" FontSize="13" FontWeight="SemiBold" />
        <TextBlock Text="{Binding IsNavigating, ElementName=DemoNav, StringFormat='IsNavigating: {0}'}"
                   FontSize="12" />

        <Separator />
        <TextBlock Text="NavigationPage exposes events for push, pop, insert, remove, and modal operations. Pages also fire NavigatedTo and NavigatedFrom on each navigation."
                   TextWrapping="Wrap" FontSize="12" Opacity="0.7" />
      </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>