DynamicRest.RestClient.PerformOperationAsync C# (CSharp) Method

        private RestOperation PerformOperationAsync(string operationName, params object[] args)
        {
            JsonObject argsObject = null;
            if ((args != null) && (args.Length != 0)) {
                argsObject = (JsonObject)args[0];
            }

            RestOperation operation = new RestOperation();

            HttpWebRequest webRequest = CreateRequest(operationName, argsObject);

            webRequest.BeginGetResponse((ar) => {
                try {
                    HttpWebResponse webResponse = (HttpWebResponse)webRequest.EndGetResponse(ar);
                    if (webResponse.StatusCode == HttpStatusCode.OK) {
                        Stream responseStream = webResponse.GetResponseStream();

                        try {
                            object result = ProcessResponse(responseStream);
                            operation.Complete(result,
                                               webResponse.StatusCode, webResponse.StatusDescription);
                        }
                        catch (Exception e) {
                            operation.Complete(new WebException(e.Message, e),
                                               webResponse.StatusCode, webResponse.StatusDescription);
                        }
                    }
                    else {
                        operation.Complete(new WebException(webResponse.StatusDescription),
                                           webResponse.StatusCode, webResponse.StatusDescription);
                    }
                }
                catch (WebException webException) {
                    HttpWebResponse response = (HttpWebResponse)webException.Response;
                    operation.Complete(webException, response.StatusCode, response.StatusDescription);
                }
            }, null);

            return operation;
        }