public static IOrderedAsyncEnumerable <TSource> ThenBy <TSource, TKey>(this IOrderedAsyncEnumerable <TSource> source, Func <TSource, TKey> keySelector) => LinqEnumerable.ThenBy(source, keySelector);
public static IOrderedAsyncEnumerable <TSource> ThenBy <TSource, TKey>(this IOrderedAsyncEnumerable <TSource> source, Func <TSource, TKey> keySelector) => LinqEnumerable.ThenBy(source, keySelector);