title: Update A Collection With Entity Framework
body: <p>I have a detached set of client objects that I'd like to update (I know they already exist in the db by primary key).  Now I want to update them to the database.  Knowing I need to query them first, I do so and now have to basically take the properties from the deattached objects and apply them to the attached objects.  I finally call save changes.  Is there a slick way to apply these properties from the detached collection to the attached one?</p>
  
  <p>NOTE: The detached objects don't have the primary keys in them but I do have enough information to link with via a comparer class.</p>