public ActionResult Download(String id) { HoloTableController._lockMap[id] = HoloTableController._lockMap.GetValue(id, new Object()); lock (HoloTableController._lockMap[id]) { var model = new DetailModel(id); var js_handle = this.Request.Cookies["js_handle"]; var handle = id; if (js_handle != null && !String.IsNullOrWhiteSpace(js_handle.Value)) { handle = js_handle.Value; } return File(model.GetBytes(), "application/xml", String.Format("{0}.xml", handle)); } }