private void Tambah_Click(object sender, EventArgs e) { AddRoleDialog f = new AddRoleDialog(); DialogResult dialog = f.ShowDialog(this); if (dialog == DialogResult.OK) { RolesModel roles = new RolesModel(Session.DefaultSession); roles.rolename = f.rolename.Text; roles.Save(); RolesComboBoxEdit.Properties.Items.Clear(); foreach (RolesModel r in roles_coll) { RolesComboBoxEdit.Properties.Items.Add(r.rolename); } } }