Avalonia/samples/IntegrationTestApp/Pages/MenuPage.axaml

<UserControl 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"
             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="IntegrationTestApp.Pages.MenuPage">
  <DockPanel>
    <Menu DockPanel.Dock="Top">
      <MenuItem Name="RootMenuItem" Header="_Root">
        <MenuItem Name="Child1MenuItem" Header="_Child 1" InputGesture="Ctrl+O" Click="MenuClicked"/>
        <MenuItem Name="Child2MenuItem" Header="C_hild 2">
          <MenuItem Name="GrandchildMenuItem" Header="_Grandchild" Click="MenuClicked"/>
        </MenuItem>
      </MenuItem>
    </Menu>
    <StackPanel>
      <TextBlock Name="ClickedMenuItem">None</TextBlock>
      <Button Name="MenuClickedMenuItemReset" Click="MenuClickedMenuItemReset_Click">Reset</Button>
      <TextBox Name="MenuFocusTest"/>
    </StackPanel>
  </DockPanel>
</UserControl>