Simple check condition, do something script

using UnityEngine;

// @kurtdekkker
//
// A generic way to set up a checker in Unity3D that will live
// on another GameObject and periodically check a condition.
//
// When that condition returns true, this does an action and
// destroys itself.
//
// A prime use of this is to reactivate an inactive GameObject.
// Inactive GameObjects will not have scripts run, so this must
// live on another GameObject entirely, and the Create() method
// takes care of this.
//
// Example use, to resurrect a fallen enemy:
//
//  // when you kill the enemy:
//  EnemyGameObject.SetActive(false);
//  // to make the enemy reappear:
//  CheckConditionAndPerformAction.Create(
//      () => { return TimeToResurrectThisEnemyYet( EnemyGameObject); },
//      () => { EnemyGameObject.SetActive(true); }
//  );
//  // in the above example you must provide a TimeToResurrectThisEnemyYet(GameObject)
//  // method that knows when this enemy is due to reappear.
//
// Example use, to give a one-time extra life when you reach 1000 points:
//
//  CheckConditionAndPerformAction.Create(
//      () => { return UserScore >= 1000; },    // condition to check
//      () => { PlayerLifeCounter++; },         // what we do when condition is true
//      0.1f);                                  // how often we check (seconds interval)

public class CheckConditionAndPerformAction : MonoBehaviour
{
    System.Func<bool> ConditionToCheck;
    System.Action ActionToPerform;
    float CheckingInterval;

    public static CheckConditionAndPerformAction Create(
        System.Func<bool> ConditionToCheck,
        System.Action ActionToPerform,
        float CheckingInterval = 0)
    {
        var go = new GameObject("CheckConditionAndPerformAction.Create();");

        var checker = go.AddComponent<CheckConditionAndPerformAction>();

        checker.ConditionToCheck = ConditionToCheck;
        checker.ActionToPerform = ActionToPerform;
        checker.CheckingInterval = CheckingInterval;

        return checker;
    }

    float age;

    private void Update()
    {
        age += Time.deltaTime;
        if (age >= CheckingInterval)
        {
            age -= CheckingInterval;

            if (ConditionToCheck())
            {
                ActionToPerform();

                Destroy(gameObject);
            }
        }
    }
}