static void Main(string[] args) { ImageData i1 = new ImageData("panda", "24/08/2563", "JPG", "46 KB"); AlbumPicture a1 = new AlbumPicture("001", "animal pictures", "24/08/2563", "File folder", i1); ImageData i2 = new ImageData("zebra", "24/08/2563", "PNG", "61 KB"); AlbumPicture a2 = new AlbumPicture("001", "animal pictures", "24/08/2563", "File folder", i2); Console.WriteLine(a1.ToString()); Console.WriteLine(a2.ToString()); }