title: NHibernate LazyInitializationException.. How to prevent?
body: <p>I'm getting the following error on our production web server:</p>
  
  <pre><code>NHibernate.LazyInitializationException
  : 
  Initializing[Domain.Entities.AudienceTypes.Region#4]-failed to lazily initialize a 
  collection of role: Domain.Entities.AudienceTypes.Region.PeerGroups, 
  no session or session was closed
  </code></pre>
  
  <p>which isn't good. The only way to get the application working again is to reset IIS, which isn't really an option. What does this mean? How can I prevent it?</p>