title: Updating LinqDataSource from separate DataContext
body: <p>I want to update one LinqDataSource with a record retrieved from a different DataContext. The problem is that the DataContext of the LinqDataSource doesn't seem to be made public so I can't get access to it to attach the new object to the DataSource's context. </p>
  
  <p>What is the normal way of doing this? Or should I just scrap the LinqDataSource</p>