private void btnIniciar_Click(object sender, EventArgs e) { Dominio.Configuracao configuracao = new Dominio.Configuracao(); if (configuracao.IsValido()) { int idContest = (int)cmbContest.SelectedValue; if (idContest > 0) { _Questoes = _QuestaoRepositorio.Questoes(idContest); foreach (var item in _Questoes) { _QuestaoRepositorio.DownloadQuestao(item); } lstProblemas.DataSource = _Questoes; cmbContest.Enabled = false; timer2.Enabled = true; } } }