Classes and Objects in C#

Introduction

Understanding classes and objects is essential for mastering object-oriented programming (OOP) in C#. These are the building blocks of every .NET application.

📦 Class – The Blueprint

A class is a template or blueprint that defines what data (fields or properties) and behaviors (methods) an object will have. It does not hold data itself.

class Car {
    public string Model;
    public int Year;

    public void Drive() {
        Console.WriteLine("Driving the car");
    }
}

Explanation:

• Model and Year are properties
• Drive() is a method (behavior)

🚗 Object – The Real Instance

An object is an actual instance of a class. It contains real values for properties and can invoke the class's methods.

Car myCar = new Car();
myCar.Model = "Toyota";
myCar.Year = 2022;
myCar.Drive(); // Output: Driving the car

Explanation:

• myCar is an object of the Car class
• It holds values: "Toyota", 2022
• It calls the Drive() method

🧠 Real-World Analogy

Think of a class as a blueprint for a house. It defines how the house should look, where the rooms are, and what features it includes. But no one can live in a blueprint.

An object is the actual house built using that blueprint — it’s tangible and usable.

💡 Why It Matters

• Modularity: Organize your code into reusable pieces
• Scalability: Add more features by expanding classes
• Maintainability: Isolate logic into meaningful objects

✅ Summary

Concept	Description	Example
Class	Blueprint for an object	class Car { }
Object	Instance of a class	Car myCar = new Car();

🎯 Final Thoughts

By mastering classes and objects in C#, you're building the foundation of object-oriented programming. You’ll write cleaner, modular, reusable, and scalable code — key traits of a great software engineer.