static void Main(string[] args)
{
Program et = new Program();
et.SayEvent = new SayDelegate(Program.sayHello);
et.TriggerEvent();
ClassA inst = new ClassA();
inst.MyEvent += new ClassA.MyDelegate(ClassA.Do1);
inst.MyEvent += new ClassA.MyDelegate(ClassA.Do2);
inst.trigger();
Console.ReadKey();
}