public ActionResult Edit()
        {
            CitiesService citiesService = new CitiesService();

            CitiesEditVM model = new CitiesEditVM();
            TryUpdateModel(model);

            if (!ModelState.IsValid)
            {
                model.Countries = citiesService.GetSelectedCountries();
                return View(model);
            }

            City city;
            if (model.ID == 0)
            {
                city = new City();
            }
            else
            {
                city = citiesService.GetByID(model.ID);
                if (city == null)
                {
                    return RedirectToAction("List");
                }
            }

            city.ID = model.ID;
            city.Name = model.Name;
            city.PostCode = model.PostCode;
            city.CountryID = model.CountryID;

            citiesService.Save(city);

            return RedirectToAction("List");
        }