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// CarDelegate points to the ServiceDepartment.WashCar function.

public void ProcessCars(Car.CarMaintenanceDelegate proc)

{

...

foreach(Car c in theCars)

proc(c);     // proc(c) => ServiceDepartment.WashCar(c)

}

Likewise, if you say the following:

// Rotate the tires.

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

then ProcessCars() can be understood as

// CarDelegate points to the ServiceDepartment.RotateTires function:

public void ProcessCars(Car.CarMaintenanceDelegate proc)

{

foreach(Car c in theCars)

proc(c);     // proc(c) => ServiceDepartment.RotateTires(c)

...

}

■

Source Code

The CarGarage project is located under the Chapter 11 subdirectory.

So at this point in the chapter, you have seen three examples of delegates at work. The first

example (SimpleDelegate) illustrated the basics of defining and manipulating delegate types. As

shown, a delegate simply maintains a list of methods to call at a later time when you call (implicitly

or explicitly) the Invoke() method. Our second example (CarDelegate) illustrated how delegates can

be used to establish an event architecture (in place of .NET interface types). Finally, the example we

just completed pointed out that delegates can be used as method parameters just like any other

.NET type.