What are the main OOP Concepts in C#?

 OOP in C# is built around four main pillars: Encapsulation, Abstraction, Inheritance, and Polymorphism.

I use encapsulation to protect internal object state — for example, exposing a balance via a method instead of a public field. I use abstraction via interfaces like IPaymentService to decouple implementation from usage. Inheritance helps me reuse base logic, like having a BaseEntity for audit fields. Polymorphism lets me override methods like ToString() or create specialized behavior for different user types in the system.

These concepts help me write clean, modular, and maintainable code that’s easier to test and extend.

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