How to cast an object to a list of generic type in F#

Question

In the following snippet my intention is to convert a System.Object (which could be an FSharpList) to a list of whatever generic type it is holding.

    matc         


        

Answer 1

It turns out that either list<'a> or array<'a> can be matched as seq

    match o with
    | :? seq -> addChildCollection(o :?> seq)
    | _           -> addChild(o)

I don't really care that it is a list. As long as I can iterate over it.