Sorts the elements of a sequence in ascending order by using the values itself as keys.

// 1, 2, 7, 11
Enumerable.create(1, 7, 11, 2)
          .order();

With comparer

// 111, 77, 22, 11
Enumerable.create(11, 77, 111, 22)
          .order('x, y => y - x');