nhibernate does not release memory after session closes

I am using NHibernate 2.2 with c# 3.5 and VS2008,

The problem is when I close the Nhibernate Session object, the memory is not released. even I call GC.Collect() after every close, but nothing is getting fre开发者_如何学运维ed up

How can I force NHibernate to release the objects loaded in session when session is closed?

thanks

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Use Dispose instead of close. (Not only for Session, but for every object implementing IDisposable in .net)

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There are a number of things which could prevent garbage collection actually occurring even if you call GC.Collect();. For example if other objects which are still alive and in use are holding a reference to something you no longer want, then the object will be kept alive.

Also don't forget that a portion of the memory used will be the objects that NHibernate has returned fro the database for you.