public IHttpActionResult DownloadFile(Guid fileId)
 {
     try
     {
         var filePath = FileStorageHelper.FindFile(fileId);
         return(GetOutputFileAsResponse(filePath, FileStorageHelper.GetClearFileName(Path.GetFileName(filePath), fileId)));
     }
     catch (Exception ex)
     {
         return(HandleExceptionResult(HttpStatusCode.InternalServerError, "Failed to download file", ex));
     }
 }