XAML-Map-Control/MapUiTools/WinUI/MenuButton.WinUI.cs

using System.Collections.Generic;
#if UWP
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Markup;
#elif WINUI
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Markup;
#endif

namespace MapControl.UiTools;

[ContentProperty(Name = nameof(Items))]
public partial class MenuButton
{
    public MenuButton()
    {
        Flyout = new MenuFlyout();
        Loaded += async (_, _) => await Initialize();
    }

    public string Icon
    {
        get => (Content as FontIcon)?.Glyph;
        set => Content = new FontIcon { Glyph = value };
    }

    public MenuFlyout Menu => (MenuFlyout)Flyout;

    public IList<MenuFlyoutItemBase> Items => Menu.Items;
}