title: LINQ track changes
body: <p>HI,
  Wit linq i populate a generic list in DAL. then in UI layer the user removes and updates items from the list. Is it possible for LINQ to keep track of the changes without having to write code to check which items have been removed and deleting them/adding new items and updating others etc. it seems that this is not possible when using datacontext which popluates the list and seperate datacontext which is responsible fo SubmitChanges. Any help appreciated.</p>
  
  <p>thanks
  Niall</p>