Talking About OOP

An object in the real world is a thing, such as a car or a person, whereas an object in programming often represents something in the real world, such as a product or bank account, but it can also be more abstract.

In C#, we use the class and record (mostly) or struct (sometimes) C# keywords to define a type of object. We will learn about the difference between classes and structs later. We can think of a type as a blueprint or template for an object.

Concepts of OOP

The concepts of OOP are briefly described here:

• Encapsulation is the combination of the data and actions related to an object.

  • For example, a BankAccount type might have data, such as Balance and AccountName, and actions like Deposit and Withdraw. When encapsulating, we often want to control what can access those actions and the data; for example, restricting how the internal state of an object can be accessed or modified from the outside.