title: Custom properties in entity framework
body: <p>I'm wondering if this is feasible and how. I've an entity that is a simple 1 to 1 mapping against a database. I'd like to add a custom property to this entity that is the result of a stored procedure call. This SP returns a collection of the same entity (hierarchical data).</p>
  
  <p>Any ideas?</p>
  
  <p>Thanks in advance,
  Fabian</p>