private void Delete() { if (currentKunde != null) { int index = Kunden.IndexOf(currentKunde); currentKunde.ChangeTracker.State = ObjectState.Deleted; currentKunde.Kundenname = currentKunde.Kundenname + "_deleted"; Kunden[index] = currentKunde; walkthrowGridUpdaterMethod(); //kunden.Remove(currentKunde); } Console.WriteLine("Delete"); }