Well-Formed Types


This chapter provided a whirlwind tour of many topics related to building solid class libraries. All the topics pertain to internal development as well, but they are much more critical to building robust classes. Ultimately, the topic is about forming more robust and programmable APIs. In the category of robustness fit namespaces and garbage collection. Both of these items fit in the programmability category, along with the other items covered: overriding object's virtual members, operator overloading, and XML comments for documentation.

Exception handling uses inheritance heavily by defining an exception hierarchy and enforcing custom exceptions to fit within this hierarchy. Furthermore, the C# compiler uses inheritance to verify catch block order. In the next chapter, you will see why inheritance is such a core part of exception handling.

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