Specifies in which direction should we look when performing operations such as `Series.Pairwise`. ## Example let abc = [ 1 => "a"; 2 => "b"; 3 => "c" ] |> Series.ofObservations // Using 'Forward' the key of the first element is used abc.Pairwise(direction=Direction.Forward) [fsi:[ 1 => ("a", "b"); 2 => ("b", "c") ]] // Using 'Backward' the key of the second element is used abc.Pairwise(direction=Direction.Backward) [fsi:[ 2 => ("a", "b"); 3 => ("b", "c") ]] [category:Parameters and results of various operations]

[SerializableAttribute]
public enum Direction