Gabriel Schenker has just posted an excellent article explaining in detail how to the 1st and 2nd level cache in NHibernate works. This is a long overdue article on caching that will greatly benefit the community. The article also explains the differences between Get(id) and Load(id) when retrieving entities through NHibernate. I am recommending this article because it is an in depth look at one of the pieces I covered earlier on Ayende’s session from KaizenConf.