In asp.net mvc, download a file as StreamContent

frontend.js

function print(sells) {
            return $http.get("URL", {
                params: { ids: sells }, responseType: "arraybuffer"
            })
                .then(function (res) {
                    var linkElement = document.createElement('a');
                    try {
                        var blob = new Blob([res.data], { type: 'application/octet-stream' });
                        var url = window.URL.createObjectURL(blob);

                        linkElement.setAttribute('href', url);
                        linkElement.setAttribute("download", 'mypdf.pdf');

                        var clickEvent = new MouseEvent("click", {
                            "view": window,
                            "bubbles": true,
                            "cancelable": false
                        });
                        linkElement.dispatchEvent(clickEvent);
                    } catch (ex) {
                        console.log(ex);
                    }
                });
        }

method.cs

      [HttpGet]
        public HttpResponseMessage Print([FromUri] int[] ids)
        {
            var pdf = this.service.print(ids);
            MemoryStream ms = new MemoryStream(pdf);
            HttpResponseMessage httpResponseMessage = new HttpResponseMessage();
            httpResponseMessage.Content = new StreamContent(ms);
            httpResponseMessage.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
            httpResponseMessage.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
            httpResponseMessage.StatusCode = HttpStatusCode.OK;


            return httpResponseMessage;
        }