static void Main()
{
MainApp m = new MainApp();
//OnjDelegate CallBack = (OnjDelegate)Delegate.Combine(
// new OnjDelegate(MainApp.Plus),
// new OnjDelegate(MainApp.Minus),
// new OnjDelegate(m.Multiplication),
// new OnjDelegate(m.Division));
//OnjDelegate CallBack = new OnjDelegate(MainApp.Plus);
//CallBack += new OnjDelegate(MainApp.Minus);
//CallBack += new OnjDelegate(m.Multiplication);
//CallBack += new OnjDelegate(m.Division);
OnjDelegate CallBack1 = new OnjDelegate(MainApp.Plus);
OnjDelegate CallBack2 = new OnjDelegate(MainApp.Minus);
OnjDelegate CallBack3 = new OnjDelegate(m.Multiplication);
OnjDelegate CallBack4 = new OnjDelegate(m.Division);
OnjDelegate CallBack = CallBack1 + CallBack2 + CallBack3 + CallBack4;
CallBack(4, 3);
}