An object in the real world is a thing, such as a car or a person. An object in programming often represents something in the real world, such as a product or bank account, but can also be something more abstract.
In C#, we use class
(usually) or struct
(rarely) to define each type of object. You can think of a type as being a blueprint or template for an object.
Object-oriented programming concepts are briefly described here:
- Encapsulation is the combination of the data and actions that are related to an object. For example, a
BankAccount
type might have data, such asBalance
andAccountName
, as well as actions, such asDeposit
andWithdraw
. When encapsulating, you often want to control what can access those actions and the data. - Composition is about what an object is made of. For example, a car is composed of different parts, such as four wheels, several seats, and an engine.
- Aggregation is about what is related to an object. For example, a person could sit in the driver's...