private void menuItem2_Click(object sender, EventArgs e) { if (cbbFiles.SelectedIndex == -1) { MessageBox.Show("Selecione um questionĂ¡rio"); return; } if (cbbPesquisadores.SelectedIndex == -1) { MessageBox.Show("Selecione um pesquisador"); return; } var interviwerId = (from o in Interview.Survey.Interviewers.AsEnumerable() where o.Field <string>("Name") == cbbPesquisadores.SelectedItem.ToString() select o.Field <int>("Id")).First(); Interview.NewInterview(interviwerId); Form3 frm3 = new Form3(); frm3.Owner = this; frm3.Show(); }