static void Main(string[] args)
{
Asteroid a = new Asteroid();
ExplodingAsteroid ea = new ExplodingAsteroid();
SpaceShip s = new SpaceShip();
TieFighter tf = new TieFighter();
a.CollideWith(s);
a.CollideWith(tf);
ea.CollideWith(s);
ea.CollideWith(tf);
Console.WriteLine();
a = ea;
s = tf;
a.CollideWith(s);
}
public override void CollideWith(ExplodingAsteroid a)
{
Console.WriteLine("ExplodingAsteroid hit a TieFighter");
}
public virtual void CollideWith(ExplodingAsteroid a)
{
Console.WriteLine("ExplodingAsteroid hit a SpaceShip");
}
