private void EnrollUser_Load(object sender, EventArgs e) { try { ICollection <int> acts = service.GetAllRunningOrFutureActivitiesIds(); foreach (int act in acts) { listActs.Items.Add(act.ToString()); } } catch (ServiceException ex) { MessageBox.Show(ex.Message, "Error al carregar Enroll User", MessageBoxButtons.OK, MessageBoxIcon.Error); } }