AdvancedLauncher.SDK.UI.PageContainer.OnShow C# (CSharp) Метод

        public override void OnShow()
        {
            AbstractPageControl pageControl = this.Control as AbstractPageControl;
            if (pageControl != null) {
                pageControl.OnShowInternal();
            }
        }

 private void OnTabChanged(object sender, SelectionChangedEventArgs e)
 {
     PageItemViewModel selectedTab = NavControl.SelectedValue as PageItemViewModel;
     if (selectedTab == null) {
         return;
     }
     PageContainer selectedPage = selectedTab.Item.Content as PageContainer;
     if (selectedPage != null) {
         //Prevent handling over changing inside tab item
         if (currentTab == selectedPage) {
             return;
         }
         if (currentTab != null) {
             try {
                 currentTab.OnClose();
             } catch (AppDomainUnloadedException) { }
         }
         currentTab = selectedPage;
         currentTab.OnShow();
     }
 }