ASP.NET数据缓存

public List<String> GetConcertList(DateTime selectedDate)
        {
            String cacheKey;

            cacheKey = "ConcertList" + selectedDate.Date.Ticks.ToString();

            List<String> concertList = HttpContext.Current.Cache[cacheKey] as List<String>;

            if (concertList == null)
            {
                // Normally this is the call to the database that passes the selected date
                concertList.Add("Just a test for " + selectedDate.ToString());

                HttpContext.Current.Cache.Insert(cacheKey, concertList, null, DateTime.Now.AddMinutes(30),
                                                 System.Web.Caching.Cache.NoSlidingExpiration);
            }

            return concertList;
        }

有没有比使用键中的日期来缓存每天的列表更好的方法?