static void Main()
{
var source = new Eventful();
source.Announcement += m => Console.WriteLine("Announcement: " + m);
}
// This example shows how not to do something. To see the compiler error, change
// the #if false to #if true
#if false
public static void HowNotToRaiseAnEvent()
{
var source = new Eventful();
source.Announcement("Will this work?"); // No, this will not even compile
}