/// <summary>
        /// Apresenta a tela para inclusão de uma nova turma
        /// </summary>
        /// <returns></returns>
        public ActionResult Create()
        {
            using (ctx)
            {
                // Cria uma lista de escolas para preencher o dropdownlist
                var srvCollege = new CollegeService(ctx);
                var lstColleges = srvCollege.GetAll();

                ViewBag.Colleges = new SelectList(lstColleges, "ID", "Name");
            }

            return PartialView("_ModalForm", new Classroom());
        }
        /// <summary>
        /// Lista todas as escolas cadastradas
        /// </summary>
        /// <returns></returns>
        public ActionResult Index()
        {
            using (ctx)
            {
                var srvCollege = new CollegeService(ctx);
                var lstColleges = srvCollege.GetAll();

                return View(lstColleges);
            }
        }
        /// <summary>
        /// Apresenta a tela para edição de uma turma
        /// </summary>
        /// <param name="id">Código de identificação da turma</param>
        /// <returns></returns>
        public ActionResult Edit(int id)
        {
            using (ctx)
            {
                var srvClassroom = new ClassroomService(ctx);
                var oClassroom = srvClassroom.Sigle(id);

                // Cria uma lista de escolas para preencher o dropdownlist
                var srvCollege = new CollegeService(ctx);
                var lstColleges = srvCollege.GetAll();

                ViewBag.Colleges = new SelectList(lstColleges, "ID", "Name");

                return PartialView("_ModalForm", oClassroom);
            }
        }
        public ActionResult Save(Classroom oClassroom)
        {
            using (ctx)
            {
                if (ModelState.IsValid)
                {
                    try
                    {
                        var srvClassroom = new ClassroomService(ctx);

                        if (oClassroom.ID == 0)
                            srvClassroom.InsertAndSave(oClassroom);
                        else
                            srvClassroom.UpdateAndSave(oClassroom);
                    }
                    catch (Exception ex)
                    {
                        ModelState.AddModelError("", "Ocorreu um erro: " + ex.Message);
                    }
                }

                // Cria uma lista de escolas para preencher o dropdownlist
                var srvCollege = new CollegeService(ctx);
                var lstColleges = srvCollege.GetAll();

                ViewBag.Colleges = new SelectList(lstColleges, "ID", "Name");
            }

            return PartialView("_ModalForm", oClassroom);
        }