private async void Cb_areaFax_SelectionChanged(object sender, SelectionChangedEventArgs e) { try { HelpClass.StartAwait(grid_main); if (cb_areaFax.SelectedValue != null) { if (cb_areaFax.SelectedIndex >= 0) { countryid = int.Parse(cb_areaFax.SelectedValue.ToString()); await FillCombo.fillCountriesLocal(cb_areaFaxLocal, (int)countryid, brd_areaFaxLocal); } } HelpClass.EndAwait(grid_main); } catch (Exception ex) { HelpClass.EndAwait(grid_main); HelpClass.ExceptionMessage(ex, this); } }