C# OOP

C# OOP (Object-Oriented Programming)

OOP in C# is a programming paradigm based on objects and classes. It helps build scalable, reusable, and maintainable applications.

🔹 Core OOP Concepts in C#

  1. Class

  2. Object

  3. Encapsulation

  4. Inheritance

  5. Polymorphism

  6. Abstraction

🔹 Class

A class is a blueprint for creating objects.


 

🔹 Object

An object is an instance of a class.



 

🔹 Encapsulation

Encapsulation means hiding data and allowing access via methods or properties.


 

✔ Protects data from unauthorized access.

🔹 Inheritance

Inheritance allows a class to reuse another class’s properties and methods.


 

🔹 Polymorphism

Polymorphism allows methods to behave differently.

✔ Method Overriding


 

🔹 Abstraction

Abstraction hides implementation details and shows only essential features.

✔ Abstract Class


 

✔ Interface


 

🔹 OOP Access Modifiers

Modifier Access
public Everywhere
private Same class
protected Class + derived
internal Same assembly

🔹 Benefits of OOP

✔ Code reusability
✔ Easy maintenance
✔ Scalable architecture
✔ Security

🔹 Summary

✔ C# supports full OOP
✔ Classes & objects form base
✔ Encapsulation protects data
✔ Inheritance enables reuse
✔ Polymorphism adds flexibility
✔ Abstraction simplifies design

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