private void detach_Kontakt(Kontakt entity)
 {
     this.SendPropertyChanging();
     entity.Subjekt = null;
 }
 private void attach_Kontakt(Kontakt entity)
 {
     this.SendPropertyChanging();
     entity.Subjekt = this;
 }
 partial void UpdateKontakt(Kontakt instance);
 partial void DeleteKontakt(Kontakt instance);
 partial void InsertKontakt(Kontakt instance);