Why Unity Automatically Serialize Scripts?

Unity Engine
1

Hi, sometimes I need to disable save-load system, but Unity automatically load last values and assign them to serializable variables. How can I disable it?

2

Almost no information to go on here, but perhaps look up the NonSerializable attribute, if that is your issue.

3

I have a class like that:

[System.Serializable]
public class SaveData {
    public int row;
    public int  col;
}

I dont have any other code for save these values, but when I change them in game, Unity save them automatically.