namespace E_Book { internal class Program { static void Main(string[] args) { MediaAssets text = new Texte(20); MediaAssets video = new Video(20,49); MediaAssets picture = new Picture(100, 200); MediaAssets audio = new Audio(0); EBook eBook = new EBook(50); eBook.AddMediaAsset(text); eBook.AddMediaAsset(video); eBook.AddMediaAsset(picture); eBook.AddMediaAsset(audio); eBook.PrintInof(); } } }