F# Winforms Charting Asynchronous Updating

I'm trying to create a chart in winforms that databinds to a list in memory, and gets updated dynamically as the list changes. Here is my code:

open System
open System.Linq
open System.Collections
open System.Collections.Generic
open System.Drawing
open System.Windows.Forms
open System.Windows.Forms.DataVisualization
open System.Windows.Forms.DataVisualization.Charting

let link = new LinkedList<double>()
let rnd = new System.Random()
for i in 1 .. 10 do link.AddFirst(rnd.NextDouble()) |> ignore
let series = new Series()
let chart = new System.Windows.Forms.DataVisualization.Charting.Chart(Dock = DockStyle.Fill, Palette = ChartColorPalette.Pastel)

series.Points.DataBindY(link)

let form = new Form(Visible = true, Width = 700, Height = 500)
form.Controls.Add(chart)

let formloop = async {
    while not chart.IsDisposed do
        link.AddFirst((new System.Random()).NextDouble()) |> ignore
        link.RemoveLast()
}
do
    Async.StartImmediate(formloop)
    Application.Run(form)

Console.WriteLine("Done")
Console.ReadLine() |> ignore

The async seems to work, but the chart never shows anything. It just shows a blank window. What am I doing wrong?