private void OnAddCity(City city)
        {
            var rnd = new Random();

            CityId i         = CityId.NewCityId(rnd.Next());
            var    amsterdam = new City(id: i, name: "Amsterdam " + i.Item);

            //let amsterdam = { City.Id = CityId(020); Name = "Amsterdam"};
            Store.Dispatch(StoreAction.NewCityAdded(amsterdam));
        }