BistroDriveWebApp.Controllers.ManageController.UpdateAvatar C# (CSharp) Method

        public ActionResult UpdateAvatar(HttpPostedFileBase file)
        {
            ManageMessageId? message;
            if (file != null && file.ContentLength > 0)
            {
                // extract only the filename
                var fileName = User.Identity.GetUserId() + Path.GetFileName(file.FileName);
                // store the file inside ~/App_Data/uploads folder
                var path = Path.Combine(Server.MapPath("~/Uploads/avatars"), fileName);
                file.SaveAs(path);
                string id = User.Identity.GetUserId();
                // удаление старого аватара с сервера
                string old = DataManager.User.GetUserAvatar(id);
                if (old != "/Content/images/devault-avatar.png")
                {
                    path = Path.Combine(Server.MapPath(old));
                    FileInfo fi = new FileInfo(path);
                    fi.Delete();
                }
                // обновление нового аватара
                DataManager.User.UpdateUserAvatar(id, "/Uploads/avatars/" + fileName);
                message = ManageMessageId.AvatarUpdated;
            }
            else
            {
                message = ManageMessageId.Error;
            }
            // redirect back to the index action to show the form once again
            return RedirectToAction("Index", new { Message = message });
        }