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Note

Strictly speaking, we could have defined our delegate member variables as public, therefore avoiding the

need to create additional registration methods. However, by defining the members as private, we are enforcing

encapsulation services and providing a more type-safe solution. You’ll revisit the risk of public delegate member

variables later in this chapter when examining the C# 

event

keyword.

At this point, we need to update the Accelerate() method to invoke each delegate, rather than

iterate over an ArrayList of client-side sinks (as we did in the CallbackInterface example). Here is

the update:

public void Accelerate(int delta)

{