How to declare a generic exception type in F#

Question

How can I define an exception like the following?

exception CustomExn<\'TMessage> of \'TMessage list

Answer 1

Maybe you can just inherit from System.Exception?

type CustomExn<'TMessage> (message:'TMessage list) =
    inherit System.Exception ()  

let test =
    try
        raise (CustomExn["string"] )
    with 
    | :? CustomExn -> "CustomExn of string"
    | :? CustomExn -> "CustomExn of int"
    | _ ->  "Everything else"