I'd like to create this sql query

select * from xf_uziv u where not exists(select * from tf_project_members pm where u.ID = pm.XF_UZIV_ID)

I have this so far .I can't figure out the correct parameters order in the FieldCompareSetPredicate ctor.

            var collection = new EntityCollection<XfUzivEntity>();

            var filter = new RelationPredicateBucket();

            filter.PredicateExpression.Add(
                new FieldCompareSetPredicate(
                    TfProjectMembersFields.XfUzivId,
                    null,
                    XfUzivFields.Id,
                    null,
                    SetOperator.Exist,
                    null, true));

            adapter.FetchEntityCollection(collection, filter);

It's in the docs. Try this:

bucket.PredicateExpression.Add(new FieldCompareSetPredicate(
    XfUzivFields.Id, null, TfProjectMembersFields.XfUzivId, null,
    SetOperator.Exist, (XfUzivFields.Id == TfProjectMembersFields.XfUzivId)));

Solved, thanks..