public IHttpActionResult Post(AlunoDTO aluno)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            try
            {
                AlunoModel _aluno = new AlunoModel();
                _aluno.InserirDB(aluno);
                return(Ok(_aluno.ListarAlunoDB()));
            }
            catch (Exception ex)
            {
                return(InternalServerError(ex));
            }
        }