Microsoft® Visual C#® 2008 Step by Step

Chapter 13. Creating Interfaces and Defining Abstract Classes

After completing this chapter, you will be able to:

• Define an interface identifying the names of methods.

• Implement an interface in a structure or class by writing the bodies of the methods.

• Capture common implementation details in an abstract class.

• Declare that a class cannot be used as a base class by using the sealed keyword.

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 of the methods ...