NHibernate - Where ISession.Query() is located

When I try to compile the following code

using System;  using System.Collections.Generic;  using System.Reflection;  using System.Linq;  using NHibernate;    namespace NewNHTest  {      class A      { }        class Program      {          static void Main(string[] args)          {              ISession session;              var q = session.Query<A>();          }      }  }  

I get the following error:

'NHibernate.ISession' does not contain a definition for 'Query' and no extension method 'Query' accepting a first argument of type 'NHibernate.ISession' could be found (are you missing a using directive or an assembly reference?)  

NHibernate.dll version is 3.0.0.4000.
The .Net version of project is 3.5.

What am I doing wrong?
Thank you for your help!

ISession.Query is new to NH3 and is an extension method. Try "using NHibernate.Linq" and it should be resolved fine.

转载自：http://stackoverflow.com/questions/4666665/nhibernate-where-isession-queryt-is-located