public void Not_exists_criterion_query() { var criterion = Criterions.FieldNotExists(); var builder = new QueryBuilder(Criterions.Field <Person, string>(x => x.Name.Firstname, criterion)); using (var query = Collection.CreateQuery <Person>(builder)) using (var cursor = query.Execute(QueryMode.Explain)) { Console.WriteLine(cursor.GetLog()); Assert.That(cursor.Count, Is.EqualTo(0)); } }