private async void Page_Loaded(object sender, RoutedEventArgs e) { List <RootObject> myData = await APIManager.GetData(); for (int i = 0; i < myData.Count; i++) { myData[i].content.rendered = RemoveHtmlTag(myData[i].content.rendered); colection.Add(myData[i]); } APIGridView.ItemsSource = colection; }