MVC4 ApiController Download FIle

DownloadController.cs

using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Web.Http;

namespace Web.Controllers
{
    //usage: /download/report
    
    [RoutePrefix("download")]
    public class DownloadController : ApiController
    {
        [HttpGet("report")]
        public HttpResponseMessage Report()
        {
            using (var service = new Client())
            {
                var report = service.BuildReport();

                return DownloadResponse(report, "Report.csv");
            }
        }

        private static HttpResponseMessage DownloadResponse(string content, string fileName)
        {
            var downloadContent = new StringContent(content);

            var mediaType = new MediaTypeHeaderValue("application/octet-stream");
            var dispostition = new ContentDispositionHeaderValue("attachment") { FileName = fileName };

            downloadContent.Headers.ContentType = mediaType;
            downloadContent.Headers.ContentDisposition = dispostition;
            
            var result = new HttpResponseMessage(HttpStatusCode.OK)
            {
                Content = downloadContent
            };

            return result;
        }
    }
}

how do i handle this stream in html page?