NHIbernate中的session

学习NHibernate的时候常常对session理解的不是很清楚，看过NHibernate in action中的解释为：

The NHibernate notion of a session is something between connection and transaction.

It may be easier to think of a session as a cache or collection of loaded objects relating

to a single unit of work.

这下便对其有了一点认识，

 NHibernate can detect changes to the objects in this unit of
work. We sometimes call the ISession a persistence manager because it’s also the inter-
face for persistence-related operations such as storing and retrieving objects.