private void btnDel_Click(object sender, EventArgs e)
{
if (lbLicenses.SelectedItem != null)
{
License.Delete((License)lbLicenses.SelectedItem);
}
lbLicenses.Items.Clear();
ShowLicenses();
}
public static void Delete(TransportType transporttype)
{
License.Delete(transporttype);
foreach (var route in Route.Routes)
{
if (route.TransportType == transporttype)
{
route.SetTransportType(null);
}
}
foreach (var trn in Transportation.Transportations)
{
if (trn.TransportType == transporttype)
{
trn.TransportType = null;
}
}
TransportTypes.Remove(transporttype);
}