static void Main(string[] args) { CellPhoneBrand M4; CellPhoneBrand Z3; M4 = new CellPhoneBrandN(); M4.SetCellPhoneSoft(new CellPhoneGame()); M4.Run(); M4.SetCellPhoneSoft(new CellPhoneAddressList()); M4.Run(); Z3 = new CellPhoneBrandM(); Z3.SetCellPhoneSoft(new CellPhoneGame()); Z3.Run(); Z3.SetCellPhoneSoft(new CellPhoneAddressList()); Z3.Run(); Console.ReadKey(); }