Hi,
Maybe I've missed the obvious but can you return a collection with passing a filter.
This is my work around.
GroupCollection groups = new GroupCollection();
IPredicateExpression groupsFilter = new PredicateExpression();
groupsFilter.Add(PredicateFactory.CompareValue(GroupFieldIndex.GroupID, ComparisonOperator.GreaterThan,0));
Cheers
Gareth