public static void RefreshItemMasters()
        {
            ItemDatabase db = new ItemDatabase();
            var itemMasters = db.GetItemMasters();

            CacheItemPolicy cacheItemPolicy = new CacheItemPolicy();
            cacheItemPolicy.AbsoluteExpiration = DateTime.Now.AddDays(1);
            cache.Set("ItemMasters", itemMasters, cacheItemPolicy);
        }