20200205-rundelayed-basic-1.cs

public class Buff : MonoBehaviour
{
    public void OnBuff()
    {
        Debug.Log("buffed!");
        RunDelayed(2f, () => {
            Debug.Log("debuffed!");
        });
    }

    protected IEnumerator DelayedCoroutine(float delay, System.Action a)
    {
        yield return new WaitForSeconds(delay);
        a();
    }

    protected Coroutine RunDelayed(float delay, System.Action a)
    {
        return StartCoroutine(DelayedCoroutine(delay, a));
    }
}