public IHttpActionResult Get(int id)
        {
            try
            {
                var PO = svr.Get(id);

                if (PO != null)
                {
                    return(Ok(PO));
                }
                else
                {
                    return(BadRequest("Submission Not Found"));
                }
            }
            catch (Exception ex)
            {
                HttpResponseMessage httpResponseMessage = new HttpResponseMessage(HttpStatusCode.BadRequest);
                httpResponseMessage.Content = new StringContent(ex.Message);
                throw new HttpResponseException(httpResponseMessage);
            }
        }