Chapter 7. Implementing Interfaces and Inheriting Classes

This chapter is about deriving new types from existing ones using object-oriented programming (OOP). You will learn how to define operators and local functions, delegates and events, implement interfaces about base and derived classes, override a type member, use polymorphism, create extension methods, and cast between classes in an inheritance hierarchy.

This chapter covers the following topics:

• Setting up a class library and console application

• Simplifying methods with operators

• Defining local functions

• Raising and handling events

• Implementing interfaces

• Managing memory with reference and value types

• Inheriting from classes

• Casting within inheritance hierarchies

• Inheriting and extending .NET types