private void CountriesAcv_OnSuggestionItemSelected(object sender, SuggestionItemSelectedEventArgs e)
        {
            var selectedCountry = e.DataItem as string;

            StatesAcv.IsEnabled   = true;
            StatesAcv.ItemsSource = Lookups.StatesLookup(selectedCountry);
            StatesAcv.Focus();
        }
 private void StatesAcv_OnFocused(object sender, FocusEventArgs e)
 {
     StatesAcv.ShowSuggestions();
 }