static void Main(string[] args)
{
MyPrinter_1 p = new MyPrinter_1();
User1 u1 = new User1(p);
User2 u2 = new User2(p);
Console.WriteLine("enter page of copy :");
int x = int.Parse(Console.ReadLine());
p.Print(x);
}
public User2(MyPrinter_1 printer)
{
this.printer = printer;
this.printer.PageOver += User2DoPageOver;
}
public User1(MyPrinter_1 printer)
{
this.printer = printer;
this.printer.PageOver += User1DoPageOver; // this.printer.PageOver = User1DoPageOver;
}