private void BillingEngine_BeforeCompare(object sender, MercatorUi.Engine.Gescom.BillingEngine.BeforeCompareEventArgs e)
{
    MercatorUi.Engine.Gescom.BillingEngine billingEngine = (MercatorUi.Engine.Gescom.BillingEngine)sender;
    billingEngine.CompareIgnorer = new MercatorUi.Engine.Gescom.BillingEngine.CompareIgnorerDescriptor(true, true);    
}