// GET: Physicians/Create public ActionResult Create() { // Only users who aren't already Physicians can be registered as Physicians SelectList users = new SelectList(db.AppUsers, "AppUserID", "Username"); SelectList physicians = new SelectList(db.Physicians, "PhysicianID", "PhysicianID"); var list = users.Where(u => physicians.All(p => p.Value != u.Value)); ViewBag.PhysicianID = list; return(View()); }