Does anyone have any example project or tutorial for using NHiberate with Umbraco.  I'm curious about best practices for creating a data layer in the code behind of a user control.  Would I need to go through the steps of establishing a new ISession each time?  On a normal MVC project, I would have an event fire on Application_BeginRequest that would create a new session and repository and eventually inject the repositoy in the controller.  Is there a similar methodolgy for .net user controls in umbraco?