public override async void OnSelectItem(ArticleItem item)
 {
     if (item == null)
     {
         return;
     }
     var viewModel = new ArticleContentPageViewModel(item.Slug);
     var page      = new ArticleContentPage(viewModel);
     await NavigationService.PushAsync(page);
 }
 public override async void OnSelectItem(CollectionItem item)
 {
     if (item == null)
     {
         return;
     }
     if (IsBusy == true || IsInitialize == false)
     {
         return;
     }
     if (item.DailyOrArticleImage == "daily_24dp.png")
     {
         var viewModel = new DailyContentPageViewModel(item.IdOrSlug);
         var page      = new DailyContentPage(viewModel);
         await NavigationService.PushAsync(page);
     }
     else
     {
         var viewModel = new ArticleContentPageViewModel(item.IdOrSlug);
         var page      = new ArticleContentPage(viewModel);
         await NavigationService.PushAsync(page);
     }
 }