List<StoreData> GetCacheDataList()
        {
            List<StoreData> datalist = null;

            object cacheObject = HttpContext.Current.Cache.Get(CACHE_KEY);

            if (cacheObject == null)
            {
                datalist = new List<StoreData>(this.capacity);

                HttpContext.Current.Cache.Insert(CACHE_KEY, datalist);
            }
            else
            {
                datalist = (List<StoreData>)cacheObject;
            }

            return datalist;
        }