ViewBeta.axaml

<UserControl
    x:Class="Lemon.ModuleNavigation.Sample.Views.ViewBeta"
    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"
    d:DesignHeight="450"
    d:DesignWidth="800"
    mc:Ignorable="d">
	<Border
        Background="CadetBlue"
        BorderBrush="LemonChiffon"
        HorizontalAlignment="Stretch"
        BorderThickness="1">
		<StackPanel>
			<TextBlock Text="{Binding Greeting}" />
			<Button
                HorizontalContentAlignment="Center"
                VerticalContentAlignment="Center"
                Command="{Binding UnloadViewCommand}"
                Content="UnloadView"
                IsVisible="{Binding !IsDialog}"/>
			<Button
                Command="{Binding CloseCommand}"
                Content="CloseDialog"
                IsVisible="{Binding IsDialog}" />
		</StackPanel>
	</Border>
</UserControl>