Chapter 13. Creating Interfaces and Defining Abstract Classes
After completing this chapter, you will be able to
Define an interface specifying the signatures and return types of methods.
Implement an interface in a structure or class.
Reference a class through an interface.
Capture common implementation details in an abstract class.
Implement sealed classes that cannot be used to derive new classes.
Inheriting from a class is a powerful mechanism, but the real power of inheritance comes from inheriting from an interface. An interface does not contain any code or data; it just specifies the methods and properties that a class that inherits from the interface must provide. Using an interface enables you to completely separate the names and signatures ...