public static void Save(SlideShowItem SlideShowItem)
        {
            SlideShowItem.UpdateTime = DateTime.Now;

            SlideShowItemCache.Remove(SlideShowItem);
            SlideShowItemCache.Add(SlideShowItem);
            SlideShowItemCache = SlideShowItemCache.OrderBy(b => b.Sort).ThenByDescending(c => c.CreateTime).ToList();

            //更新資料庫
            SlideShowItemAccessor.UpdateInsert(SlideShowItem);
        }