I have, in EF5, two entities: User and Role.

Between User and Role there is a many to many relation.

I don't have an entity for the UserRoles database which sets the relation.

I have a User and I want to delete a role without loading it from the database.

  Context context = new Context();
  User user = context.Users.First(x => x.Id == 4);
  user.Roles = new List<Role>();
  Role role = new Role { Id = 20 };
  context.Roles.Attach(role);
  user.Roles.Remove(role);
  context.SaveChanges();

I don't get any error but the role is not removed.

Any idea why?

Thank you, Miguel