partial void DeleteDeptPoPromo(DeptPoPromo instance);
 partial void UpdateDeptPoPromo(DeptPoPromo instance);
 private void detach_DeptPoPromos(DeptPoPromo entity)
 {
     this.SendPropertyChanging("DeptPoPromos");
     entity.Gift = null;
 }
 partial void InsertDeptPoPromo(DeptPoPromo instance);
 private void attach_DeptPoPromos(DeptPoPromo entity)
 {
     this.SendPropertyChanging("DeptPoPromos");
     entity.DeptPrmtn = this;
 }