public static void Main()
{
Thing t = new Thing();
// Outputs "I am a Thing." as expected.
t.AnnounceSelf();
// Outputs "Here is a Thing." as expected.
Thing.AnnounceThing(t);
t = new OtherThing();
// This method is virtual, so even though t is typed as Thing,
// the implementation provided by OtherThing will be called;
// outputs "I am ANOTHER Thing."
t.AnnounceSelf();
// In contrast to above, this method will NOT call the more
// specific overload of AnnounceThing (accepting an OtherThing
// argument) because t is only typed as Thing, so the compiler
// will go with the first;
// outputs "Here is a Thing."
Thing.AnnounceThing(t);
// THIS will output "Here is ANOTHER type of Thing."
Thing.AnnounceThing((OtherThing)t);
}
