public ActionResult DeleteReferenceFile(int id)
        {
            var blReference = new BLReference();

            var reference = blReference.GetReferenceById(id);

            //if (reference != null)
            //{
            //    UIHelper.DeleteFile(reference.ReferenceFileUrl);
            //}

            blReference.DeleteReference(id);

            return(View("ReferenceUpload", blReference.GetAllReference()));
        }