private void detach_Kundes(Kunde entity)
 {
     this.SendPropertyChanging();
     entity.PostBy = null;
 }
 private void attach_Kundes(Kunde entity)
 {
     this.SendPropertyChanging();
     entity.PostBy = this;
 }
 partial void UpdateKunde(Kunde instance);
 partial void DeleteKunde(Kunde instance);
 partial void InsertKunde(Kunde instance);