private void detach_PURCHASEs(PURCHASE entity)
 {
     this.SendPropertyChanging();
     entity.INVENTORY = null;
 }
 partial void DeletePURCHASE(PURCHASE instance);
 partial void InsertPURCHASE(PURCHASE instance);
 partial void UpdatePURCHASE(PURCHASE instance);
 private void detach_PURCHASEs(PURCHASE entity)
 {
     this.SendPropertyChanging();
     entity.CUSTOMER = null;
 }