How can i convert between F# List and F# Tuple?

Question

Is there some way to convert between F# List and F# Tuple?

For example:

[1;2;3] -> (1,2,3)    
(1,2,3,4) -> [1;2;3;4]

I need

Answer 1

Well, it ain't pretty but:

let tuple_to_array input =
    let temp_str = input.ToString()
    temp_str.Substring(1, temp_str.Length - 2)
    |> Array.map (fun (x:string) -> x.TrimStart(' '))

I'm not sure how you'd go back the other way though. And I'm really not sure this would be sensible, but if you really have to.