private void btnSelect_Click(object sender, EventArgs e) { if (drpSystems.CurrentItem == null) { MessageBox.Show("Debe seleccionar una librerÃa.", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Warning); return; } _settings.SetString(_settingskey, (string)drpSystems.CurrentItem.Tag); _settings.Save(); ListLibraries(); }