protected override Expression <Func <MsBuildItemListAssociation, bool> > FindExisting(MsBuildItemListAssociation record)
 => existing
 => existing.MsBuildItemId == record.MsBuildItemId &&
 existing.MsBuildItemListId == record.MsBuildItemListId;
        protected override IEnumerable <object> EnumerateReferences(MsBuildItemListAssociation record)
        {
            yield return(record.MsBuildItem);

            yield return(record.MsBuildItemList);
        }