public static void Main(string[] args)
{
Firefighter joe = new Firefighter {
Name = "Joe"
};
joe.ExtinguishFire();
Firefighter bill = new TraineeFireFighter {
Name = "Bill"
};
bill.ExtinguishFire();
FireChief harry = new FireChief {
Name = "Harry", NumberOne = joe
};
Firefighter harryAsAFirefighter = harry;
harry.ExtinguishFire();
harryAsAFirefighter.ExtinguishFire();
Console.ReadKey();
}
public void TellFirefighterToExtinguishFire(Firefighter colleague)
{
colleague.ExtinguishFire();
}