Csharp Struct and Class

🧱 struct vs class – Summary Table

Feature	struct	class
Type category	Value type	Reference type
Stored in	Stack (usually)	Heap
Copied by	Value (deep copy)	Reference (shallow copy)
Inheritance	❌ Cannot inherit or be inherited (except interfaces)	✅ Full inheritance support
Default constructor	❌ Cannot define one ✅ Can define freely
Mutable?	Can be mutable, but often avoided	Fully mutable
Memory efficient?	✅ More efficient for small data	👎 Less efficient for small structs
Use cases	Lightweight data (e.g. Vector2, Color)	Complex objects, behaviors
Keyword	struct	class

⸻

🧪 Example of struct

public struct Point
{
    public int x;
    public int y;
}

Point a = new Point { x = 1, y = 2 };
Point b = a;
b.x = 99;

Debug.Log(a.x); // 🔹 Outputs 1 (copy was independent)

✔️ This is a deep copy — struct behaves like a primitive.

⸻

🧪 Example of class

public class Player
{
    public string Name;
}

Player p1 = new Player { Name = "Alice" };
Player p2 = p1;
p2.Name = "Bob";

Debug.Log(p1.Name); // 🔸 Outputs "Bob" (reference changed both)

❌ This is a reference copy — changes affect both variables.

⸻

📦 Use struct when: • You need small, simple data types (e.g. positions, colors, etc.)