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Analyzing the Delegation Code

The Main() method begins by creating an instance of the Garage and ServiceDepartment types. Now,

when you write the following:

// Wash all dirty cars.

g.ProcessCars(new Car.CarMaintenanceDelegate(sd.WashCar));

what you are effectively saying is, “Insert the address of the ServiceDepartment.WashCar() method

to a Car.CarMaintenanceDelegate object, and pass this object to Garage.ProcessCars().” Like most

real-world garages, the real work is delegated to the service department (which explains why a 

30-minute oil change takes 2 hours). Given this, ProcessCars() can be understood as