如果我将客户端连接到的服务指向一个错误的URL,为什么我得到的HttpStatusCode为0。我的statusCodeAsInt显示为0。为什么它没有显示为404并被处理?IRestResponseresponse=client.Execute(restReq);HttpStatusCodestatusCode=response.StatusCode;varstatusCodeAsInt=(int)statusCode;if(statusCodeAsInt>=500){thrownewInvalidOperationException("Aservererroroccurred:"+