class SimpleEnumerable<T> : IEnumerable<T> //, IEnumerable
{
    private T[] _items;
    public SimpleEnumerable(T[] items) {
        _items = items;
    }
    IEnumerator<T> IEnumerable<T>.GetEnumerator()
    {
        foreach (var item in _items)  
        {  
            yield return item;  
        }  
    }

    public IEnumerator GetEnumerator()
    {
        foreach (var item in _items)  
        {  
            yield return item;  
        }  
    }
}