F# barebone Agent

Agent = using message passing to avoid mutating state
type Downloader() =

    let agent =
        MailboxProcessor.Start(fun inbox ->
            let rec loop() = async {
                let msg=inbox.Receive()
                do! Async.Sleep(5000)
                return! loop()
            }
            loop()
            )

    member this.DowloadAll()=
        while(true) do
            agent.Post("test")