public void CreateLokation(ref LokationDTO lokDTO)
        {
            Check.Argument(lokDTO != null, "lokDTO != null");
            Check.Argument(lokDTO.LokNr == -1, "lokDTO.LokNr == -1");

            Lokation lok = lokDTO.ToEntity();
            this.tn_REPO.Save(lok);
            lokDTO = lok.ToDTO();
        }