private void BindablePicker_SelectedIndexChanged(object sender, EventArgs e) { if (userProfileVM.IsLoadCity == true) { userProfileVM.IsLoadCity = false; return; } var stateIndex = Convert.ToInt32(StatePicker.SelectedIndex) + 1; var lstCity = userProfileVM.GetCityData(stateIndex.ToString()); if (stateIndex > 0) { CityPicker.ItemsSource = lstCity; // CityPicker.IsEnabled = true; } }