private void MenuItemsListView_ItemClick(object sender, ItemClickEventArgs e) { var menuItem = (MenuItem)e.ClickedItem; CategoryTextBlock.Text = menuItem.Category.ToString(); PictureManager.GetPicturesByCategory(pictures, menuItem.Category); BackButton.Visibility = Visibility.Visible; //Picture menuItem = (Picture)e.ClickedItem; //CategoryTextBlock.Text = menuItem.Category.ToString(); //PictureManager.GetPicturesByCategory(pictures, menuItem.Category); //BackButton.Visibility = Visibility.Visible; }