romrepomgr/RomRepoMgr/Views/MainWindow.xaml

<Window xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vm="clr-namespace:RomRepoMgr.ViewModels;assembly=RomRepoMgr"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignWidth="800"
        d:DesignHeight="450" x:Class="RomRepoMgr.Views.MainWindow" Icon="/Assets/avalonia-logo.ico" Title="RomRepoMgr">
    <Design.DataContext>
        <vm:MainWindowViewModel />
    </Design.DataContext>
    <DockPanel>
        <Menu DockPanel.Dock="Top">
            <MenuItem Header="_File">
                <MenuItem Header="_Settings" IsVisible="{Binding !NativeMenuSupported}"
                          Command="{Binding SettingsCommand}" />
                <Separator />
                <MenuItem Header="E_xit" IsVisible="{Binding !NativeMenuSupported}" Command="{Binding ExitCommand}" />
            </MenuItem>
            <MenuItem Header="_Help">
                <MenuItem Header="_About" Name="AboutMenuItem" IsVisible="{Binding !NativeMenuSupported}"
                          Command="{Binding AboutCommand}" />
            </MenuItem>
        </Menu>
        <TextBlock Text="{Binding Greeting}" HorizontalAlignment="Center" VerticalAlignment="Center" />
    </DockPanel>
</Window>