IDamagable.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

//interfaces dont derive form anything
public interface IDamagable
{
    //they only use properties which are empty since its just a "contract"
     int Health
    {
        get;
        set;
    }
    
    //and empty methods which outline the derived class obligations
     void Damage(int damageAmount);
}