Practice and explore

Test your knowledge and understanding by answering some questions. Get some hands-on practice and explore with deeper research into this chapter's topics.

Exercise 7.1 - test your knowledge

Answer the following questions:

1. What is a delegate?

2. What is an event?

3. How are a base class and a derived class related?

4. What is the difference between is and as?

5. Which keyword is used to prevent a class from being derived from or a method from being overridden?

6. Which keyword is used to prevent a class from being instantiated with the new keyword?

7. Which keyword is used to allow a member to be overridden?

8. What's the difference between a destructor and a deconstructor?

9. What are the signatures of the constructors that all exceptions should have?

10. What is an extension method and how do you define one?

Exercise 7.2 - practice creating an inheritance hierarchy

Add a new console application named Ch07_Exercise02.

Create a class named Shape with properties named Height, Width, and Area.

Add three classes that...