Model view controller Json返回格式错误的字符串

Json返回此格式的字符串。有没有从json获取实际格式字符串的解决方案？实际格式为

一般的

public ActionResult BusinessUnitNameSelect(BusinessUnitDTO business)
    {
        BOSetup setup = new BOSetup();
       string newBusiness = setup.BusinessUnitNameSelect(business);
        return Json(newBusiness, JsonRequestBehavior.AllowGet);
    }

      {0: "G", 1: "e", 2: "n", 3: "e", 4: "r", 5: "a", 6: "l", $promise: Promise, $resolved: true}