Combine writing in XAML with defining MenuItemsSource for some specific NavigationMenuItem

[dawnchan030920]

Background

There's a NavigationView with some NavigationViewMenuItem written in XAML. At the same time, I also have an ObservableCollection bound to a NavigationViewMenuItem's MenuItems.

Problem

Since there's no MenuItemTemplate property for NavigationViewMenuItem, I have no idea what to do. It seems that I have to write a selector that will require me to hard-code NavigatoinView's items type by projecting them to platform independent model and transform the items all into collections to bind them.

Question

Is there a best practice or some "standard" solution towards it?

Sorry for my poor English /(ㄒoㄒ)/~~ Really appreciate your help~