anchor.diff:              ContentView <- new PrefillXamarinAccountInstructionsView ()
               scrollView.Add(ContentView)
           else
  -            LoginView <- new LoginView (xamarinAccountEmail)
  -            LoginView.UserDidLogin <- fun _ -> this.Login xamarinAccountEmail LoginView.PasswordField.Text |> Async.StartImmediate
  +            LoginView <- new LoginView (XamarinAccountEmail)
  +            LoginView.UserDidLogin <- fun _ -> this.Login XamarinAccountEmail LoginView.PasswordField.Text |> Async.StartImmediate
               ContentView <- LoginView
               scrollView.Add ContentView
   
  
positive.code: 
      // TODO: Enter your Xamarin account email address here
      // If you do not have a Xamarin Account please sign up here: https://store.xamarin.com/account/register
      let xamarinAccountEmail = ""
  
      let mutable ContentView:UIView = null
      let mutable LoginView = null
  
negative.code:     member val LoginSucceeded = fun () -> () with get,set
         
      member this.ShouldShowInstructions
          with get () = XamarinAccountEmail = ""
  
      override this.ViewDidLayoutSubviews () =
          let mutable bounds = this.View.Bounds
  