.NET 4.x Создать Custom Awaiter - C#

Формулировка задачи:

Здраствуйте, нужна помощь в создании custom awaiter'а:

class CustomAwaiter : INotifyCompletion
    {
        private Action _continuation;
 
        public CustomAwaiter()
        {
            IsCompleted = false;
        }
 
        public bool IsCompleted { get; private set; }
 
        public void GetResult()
        {
        }
 
        public void Complete()
        {
            if (_continuation != null)
            {
                _continuation();
                IsCompleted = true;
            }
        }
 
        public void OnCompleted(Action continuation)
        {
            _continuation += continuation;
        }
    }

Задача:

-Create an awaiter that will allow awaiting on a integer. The integer represents the amount of miliseconds to delay. -Create a custom awaiter that will allow awaiting on a process and continue when the process exit.

Не доходит как реализовать =)

Решение задачи: «.NET 4.x Создать Custom Awaiter»

textual
                            Листинг программы 
                        

                            EventWaitHandle waitHandle = new AutoResetEvent(false);
waitHandle.WaitOne(3000);
waitHandle.Set();
                        