MonoGame(F#) でウィンドウに好きなアイコンを設定する方法

Program.fs

namespace Sample
open Microsoft.Xna.Framework
open Microsoft.Xna.Framework.Graphics

type SampleGame () as this = 
  inherit Game()
  let gametitle, gmanager, sprite = "Sample", new GraphicsDeviceManager(this), lazy new SpriteBatch(this.GraphicsDevice)
  
  do 
    gmanager.PreferredBackBufferWidth <- 800
    gmanager.PreferredBackBufferHeight <- 480

  override this.Initialize() =
    base.Window.Title <-gametitle
    base.Initialize()

  override this.Draw(gameTime) = 
    gmanager.GraphicsDevice.Clear(Color.CornflowerBlue)
    sprite.Force().Begin ()
    sprite.Force().End ()
    base.Draw (gameTime)

module main =         
  open System.Reflection

  [<EntryPoint>]
  let main args =
    let icon = new System.Drawing.Icon(@"Icon.ico")
    use game = new SampleGame()
    let gameWindow = game.Window
    let field = typeof<OpenTKGameWindow>.GetField("window", BindingFlags.NonPublic ||| System.Reflection.BindingFlags.Instance)
    let window =
      if (field <> null) then
          field.GetValue(gameWindow) :?> OpenTK.GameWindow
      else null
    window.Icon <- icon
    game.Run()
    0