public static HotelFactory getHotelFactoryInstance()
 {
     if (hotelFactory == null)
     {
         hotelFactory = new HotelFactory();
     }
     return(hotelFactory);
 }
        public static List <Hotel> createHotelList()
        {
            HotelFactory hotelFactory = HotelFactory.getHotelFactoryInstance();

            hotelFactory.createHotel("123456");
            hotelFactory.createHotel("654321");
            hotelFactory.createHotel("321456");
            hotelFactory.createHotel("456321");
            hotelFactory.createHotel("123654");
            hotelFactory.createHotel("987654");
            hotelFactory.createHotel("456789");
            hotelFactory.createHotel("981345");
            hotelFactory.createHotel("587942");
            hotelFactory.createHotel("958123");
            return(hotelFactory.getHotelList());
        }