public ActionResult AddPrefixToDepartment(int id)
        {
            ScheduleManager manager = new ScheduleManager();

            ViewBag.PrefixList = manager.GetDepartmentPrefixesFromHP();
            var model = new DepartmentPrefixItem();
            model.DepartmentId = id;

            return PartialView("_AddPrefixToDepartment", model);
        }