System.Web.Caching.Cache.SetItemTimeout C# (CSharp) Method

		void SetItemTimeout (CacheItem ci, DateTime absoluteExpiration, TimeSpan slidingExpiration, CacheItemRemovedCallback onRemoveCallback,
				     CacheItemUpdateCallback onUpdateCallback, string key, bool doLock)
		{
			bool disableExpiration = DisableExpiration;

			if (!disableExpiration) {
				ci.SlidingExpiration = slidingExpiration;
				if (slidingExpiration != NoSlidingExpiration)
					ci.AbsoluteExpiration = DateTime.Now + slidingExpiration;
				else
					ci.AbsoluteExpiration = absoluteExpiration;			
			}
			
			ci.OnRemoveCallback = onRemoveCallback;
			ci.OnUpdateCallback = onUpdateCallback;
			
			try {
				if (doLock)
					cacheLock.EnterWriteLock ();

				if (key != null) {
					cache [key] = ci;
					cache.EvictIfNecessary ();
				}
				
				ci.LastChange = DateTime.Now;
				if (!disableExpiration && ci.AbsoluteExpiration != NoAbsoluteExpiration) {
					ci.IsTimedItem = true;
					EnqueueTimedItem (ci);
				}
			} finally {
				if (doLock) {
					// See comment at the top of the file, above cacheLock declaration
					cacheLock.ExitWriteLock ();
				}
			}
		}