overrides.cs

protected override JsonResult Json(object data, string contentType, System.Text.Encoding contentEncoding, JsonRequestBehavior behavior)
  {
      var result = new NewtonSoftJsonResult();
      result.Data = data;
      result.ContentType = contentType;
      result.ContentEncoding = contentEncoding;
      result.JsonRequestBehavior = behavior;
      return result;
  }
protected override JsonResult Json(object data, string contentType, System.Text.Encoding contentEncoding)
  {
      return Json(data, contentType, contentEncoding, JsonRequestBehavior.DenyGet);
  }