private static void OnCurrentMunicipalityPropertyChanged(DependencyObject source, DependencyPropertyChangedEventArgs e)
        {
            CityPopup             popup      = source as CityPopup;
            MunicipalityViewModel animalType = (MunicipalityViewModel)e.NewValue;

            popup.PopulateFromDb("");
        }
        private static void OnCurrentCityPropertyChanged(DependencyObject source, DependencyPropertyChangedEventArgs e)
        {
            CityPopup     popup = source as CityPopup;
            CityViewModel city  = (CityViewModel)e.NewValue;

            popup.txtCity.Text = city != null ? city.ZipCode + " (" + city.Name + ")" : "";
        }