static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Textbook MyBook = new Textbook();
Console.WriteLine(Convert.ToString(MyBook.electronic_analogue()));
Console.WriteLine(Convert.ToString(((IBook)MyBook).electronic_analogue()));
Journal MyJournal = new Journal();
Magazine MyMagazine = new Magazine();
bool b = MyBook is Print_Edition;
Print_Edition d = MyBook as Print_Edition;
Console.WriteLine($"{b} - {d}");
bool x = MyJournal is IPerson;
IPerson y = MyJournal as IPerson;
Console.WriteLine($"{x} - {y}");
Console.WriteLine();
Console.WriteLine($"{MyMagazine.ToString()}");
Printer MyPrint = new Printer();
Console.WriteLine();
object[] mas = { MyJournal, MyMagazine, MyBook };
for (int i = 0; i < mas.Length; i++)
{
Console.WriteLine($"{MyPrint.IAmPrinting(mas[i] as Print_Edition)}");
}
Console.ReadKey();
}
public virtual object IAmPrinting(Print_Edition someobj)
{
someobj.GetType();
someobj.ToString();
return(someobj.GetType());
}
