Right now, every script in your game.
The problem
A public field takes any number.
public class Player{ public int Health = 100;} // in any script, anywhereplayer.Health = 9999;
Any script can write any value, and the player never finds out.
The fix
Read in public. Write in private.
Make it a property with a private setter. Everyone can read it. Only its own class can change it.
get→everyone
private set→only Player
The fix in code
Changes go through one door.
public class Player{ public int Health { get; private set; } = 100; public void TakeDamage( int amount ) { Health -= amount; if ( Health <= 0 ) Die(); }}
Damage has one way in, so the death check can't be skipped.
Watch out in Unity
Properties hide from the Inspector.
[field: SerializeField]public int Health { get; private set; } = 100;
The attribute lands on the hidden field behind the property, so Unity can show it.
The rule
Let everyone read it. Let one class write it.
- Everyone reads
- get
- Only the class writes
- private set
- Changes go through
- a method