System\Linq\ParallelEnumerable.cs (4)
5751return GetOneWithPossibleDefault(new SingleQueryOperator<TSource>(source, null), true, false)!;
5779return GetOneWithPossibleDefault(new SingleQueryOperator<TSource>(source, predicate), true, false)!;
5807return GetOneWithPossibleDefault(new SingleQueryOperator<TSource>(source, null), true, true);
5836return GetOneWithPossibleDefault(new SingleQueryOperator<TSource>(source, predicate), true, true);