public ActionResult RemoveDepartmentPrefix(DepartmentPrefixItem entity)
        {
            int deptId = entity.DepartmentId;

            ScheduleManager manager = new ScheduleManager();

            if (manager.RemoveDepartmentPrefixEntry(entity.PrefixId))
            {
                return RedirectToAction("EditDepartment", new { id = deptId });
            }
            else
            {
                return View("RemoveDepartmentPrefix", entity);
            }
        }