asp.net 将设有过期策略的项添加到缓存中

Cache.Insert("CacheItem6", "Cached Item 6",
null, DateTime.Now.AddMinutes(1d),
System.Web.Caching.Cache.NoSlidingExpiration);

Cache.Insert("CacheItem7", "Cached Item 7",
null, System.Web.Caching.Cache.NoAbsoluteExpiration,
new TimeSpan(0, 10, 0));