| OrderBy<T, TKey>(IEnumerable<T>, Func<T, TKey>, OrderByDirection) | Sorts the elements of a sequence in a particular direction (ascending, descending) according to a key |
| OrderBy<T, TKey>(IEnumerable<T>, Func<T, TKey>, IComparer<TKey>, OrderByDirection) | Sorts the elements of a sequence in a particular direction (ascending, descending) according to a key |