public async Task <IActionResult> Create()
        {
            CityCountriesVM vm = new CityCountriesVM()
            {
                Countries = await _context.Country.ToListAsync()
            };

            return(View(vm));
        }
        public async Task <IActionResult> Edit(int id)
        {
            CityCountriesVM vm = new CityCountriesVM()
            {
                City      = await _context.City.FindAsync(id),
                Countries = await _context.Country.ToListAsync()
            };

            return(View(vm));
        }