Avalonia/samples/ControlCatalog/Pages/NotificationsPage.xaml

<UserControl xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:viewModels="using:ControlCatalog.ViewModels"
             xmlns:system="clr-namespace:System;assembly=System.Runtime"
             x:Class="ControlCatalog.Pages.NotificationsPage"
             x:DataType="viewModels:NotificationViewModel">
  <DockPanel>
    <TextBlock DockPanel.Dock="Top"
               Margin="2" Classes="h2" TextWrapping="Wrap">TopLevel bound notification manager.</TextBlock>
    <StackPanel DockPanel.Dock="Top"
                Orientation="Vertical" Spacing="4" HorizontalAlignment="Left">
      <Button Content="Show Standard Managed Notification" Command="{Binding ShowManagedNotificationCommand}" />
      <Button Content="Show Custom Managed Notification" Command="{Binding ShowCustomManagedNotificationCommand}" />
    </StackPanel>
    
    <TextBlock DockPanel.Dock="Top"
               Margin="2" Classes="h2" TextWrapping="Wrap">XAML only notification manager.</TextBlock>
    <Button DockPanel.Dock="Top"
            Content="Show XAML only Notification" Command="{Binding #ControlNotifications.Show}">
      <Button.CommandParameter>
        <Notification Title="Title" Message="Message" OnClick="NotificationOnClick" />
      </Button.CommandParameter>
    </Button>
    <Border Padding="10" BorderBrush="{DynamicResource SystemAccentColor}">
      <WindowNotificationManager x:Name="ControlNotifications" />
    </Border>
  </DockPanel>
</UserControl>