public ActionResult Create(Modulo modulo)
        {
            if (ModelState.IsValid)
            {
                Repositorio.Incluir(modulo);
                return RedirectToAction("Index");
            }

            ViewBag.ProfessorID = new SelectList(TodosProfessoresEnumerable(), "Id", "Nome", modulo.ProfessorID);
            ViewBag.CursoID = new SelectList(TodosCursosEnumerable(), "Id", "Nome", modulo.CursoID);
            return View(modulo);
        }
        public ActionResult Edit(Modulo modulo)
        {
            ModelState["Professor"].Errors.Clear();
            ModelState["Curso"].Errors.Clear();

            if (ModelState.IsValid)
            {
                Repositorio.Atualizar(modulo);
                return RedirectToAction("Index");
            }
            ViewBag.ProfessorID = new SelectList(TodosProfessoresEnumerable(), "Id", "Nome", modulo.ProfessorID);
            ViewBag.CursoID = new SelectList(TodosCursosEnumerable(), "Id", "Nome", modulo.CursoID);
            return View(modulo);
        }