public MainPage() { InitializeComponent(); layerStack = LayerStack.DataContext as LayerStack; lessonPage = LessonPage.DataContext as Lesson; appBar = AppBar.DataContext as AppBarState; lessonPage.SetComponents(LessonPage, LessonSidebar.ThumbsContainer); layerStack.Viewport.SetComponents(LessonContainer, LessonContent, DrawingAreaBound, RadialMenu); }