1 interface Phone 2  { 3 public void createPhone(); 4 }

1 class HuaWei : Phone 2  { 3 public void createPhone() 4  { 5 Console.WriteLine("制造华为手机"); 6  } 7 }

class Vivo : Phone
    { public void createPhone()
        {
            Console.WriteLine("制造Vivo手机");
        }
    }

class PhoneFactory
    { public const int HUAWEI= 0, VIVO = 1; public Phone getPhone(int phoneType)
        { switch (phoneType)
            { case HUAWEI: return new HuaWei(); break; case VIVO: return new Vivo(); break;
            } return null;
        }
    }

 1 class Program  2  {  3 static void Main(string[] args)  4  {  5 PhoneFactory phoneFactory = new PhoneFactory();  6 Phone huawei=phoneFactory.getPhone(PhoneFactory.HUAWEI);  7  huawei.createPhone();  8  9 Phone vivo = phoneFactory.getPhone(PhoneFactory.VIVO); 10  vivo.createPhone(); 11  } 12 }