System\Linq\ParallelEnumerable.cs (4)
5754return GetOneWithPossibleDefault(new SingleQueryOperator<TSource>(source, null), true, false)!;
5782return GetOneWithPossibleDefault(new SingleQueryOperator<TSource>(source, predicate), true, false)!;
5810return GetOneWithPossibleDefault(new SingleQueryOperator<TSource>(source, null), true, true);
5839return GetOneWithPossibleDefault(new SingleQueryOperator<TSource>(source, predicate), true, true);