public ActionResult Get(object data)
        {
            System.Drawing.Bitmap qr = service.Encode(data);
            FileContentResult result;
            using (var memStream = new System.IO.MemoryStream())
            {
                qr.Save(memStream, System.Drawing.Imaging.ImageFormat.Jpeg);
                result = this.File(memStream.GetBuffer(), "image/jpeg");
            }
            return View(result);
        }

<img src="@Model" alt=""/> 

<img src="@Url.Action("GetImage")" alt=""/> 

Session.Add("image",result);

<img src="@Url.Action("GetImage")" alt=""/> 

 public ActionResult GetImage()
        {
            return Session["image"] as FileContentResult;

        }

 <script type="text/javascript">
      window.onload = function () {
          var img = document.getElementById('image');
          var button = document.getElementById('save_btn');
          button.onclick = function () {
              window.location.href = img.src.replace('image/jpeg', 'image/octet-stream');
          };
      };
        </script>