F# function parameters

Question

I have 2 lines of code here:

let stuff _ _ = MessageBox.Show("This is doing stuff") |> ignore
let stuffHandler = new EventHandler(stuff)

I just started with F# and would like to know why the code does not compile if I remove underscores from stuff variable? As far as I know underscore means to ignore something so what should be ignored here?

Answer 1

The EventHandler delegate expects a function with 2 parameters, the sender and the EventArgs.