public async void refresh()
        {
            try
            {
                MyProgressRing.IsActive   = true;
                MyProgressRing.Visibility = Visibility.Visible;

                MarvelCharcters.Clear();
                while (MarvelCharcters.Count < 20)
                {
                    Task  t = MarvelFacade.PopulateMarvelCharactersAsync(MarvelCharcters);
                    await t;
                }

                MyProgressRing.IsActive   = false;
                MyProgressRing.Visibility = Visibility.Collapsed;
            }

            catch (Exception) { }
        }
 private void autoBox_TextChanged(AutoSuggestBox sender, AutoSuggestBoxTextChangedEventArgs args)
 {
     suggestions         = MarvelCharcters.Where(p => p.name.StartsWith(sender.Text)).Select(p => p.name).ToList();
     autoBox.ItemsSource = suggestions;
 }