Chapter 19. Generics

What Are Generics?

With the language constructs you've learned so far, you can build powerful objects of many different types. You do this mostly by declaring classes that encapsulate the behavior you want, and then creating instances of those classes.

All the types used in the class declarations so far have been specific types—either programmer-defined, or supplied by the language or the BCL. There are times, however, when a class would be more useful if you could "distill" or "refactor" out its actions and apply them not just to the data types for which they are coded, but for other types as well.

Generics allow you to do just that. You can refactor your code and add an additional layer of abstraction so that, for certain kinds ...

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