Testing for null reference in F#

Question

Given the following:

[]
type TweetUser = {
    [] Followers:int
    [

        

Answer 1

Though this question is old, I didn't see any examples of boxing to solve the problem. In cases where my presenter does not allow null literals, but may be set from a view, I prefer to use boxing.

isNull <| box obj

or

let isMyObjNull = isNull <| box obj

or

match box obj with
| null -> (* obj is null *)
| _ -> (* obj is not null *)