Question

If I want to delete manually an object and all it’s children,
How can I do it (I don’t want to use cascade-delete)

When I’m trying to iterate over the children list – I get an exception because I’m changing the collection inside foreach – and that’s a problem… any other way to do it ?
(I’m setting each time state to deleted).

var myAssignemnt = (from s in context.Assignments.Include("ActivityInAssignments").Where(s => s.AssignmentID == AssignmentID) select s).FirstOrDefault();

foreach (ActivityInAssignment acc in myAssignemnt.ActivityInAssignments)
{
  context.ObjectStateManager.ChangeObjectState(acc, System.Data.EntityState.Deleted);
}
context.ObjectStateManager.ChangeObjectState(myAssignemnt, System.Data.EntityState.Deleted);
context.SaveChanges();

Answer 1

Maybe try ... in myAssignemnt.ActivityInAssignments.ToList()