Microsoft Visual C# Step by Step, 10th Edition

Chapter 20

Decoupling application logic and handling events

After completing this chapter, you will be able to:

• Declare a delegate type to create an abstraction of a method signature, and call a method through a delegate.

• Define a lambda expression to specify the code to be executed by a delegate.

• Enable notifications by using events.

• Understand how the Windows user interface utilizes events to handle user interactions.

• Handle an event by using a delegate.

Many of the examples and exercises in this book have placed great emphasis on the careful definition of classes and structures to enforce encapsulation. In this way, the implementation of the methods in these types can change without unduly affecting the applications that use them. Sometimes, ...