Update ListView on WillEnterForeground

Objective

Update a Xamarin.Forms ListView when the iOS Application Enters the foreground

Approach

The closes example I have seen is found in the monotouch samples

https://github.com/xamarin/monotouch-samples/blob/master/SimpleBackgroundFetch/SimpleBackgroundFetch/AppDelegate.cs

public override void PerformFetch (UIApplication application, Action<UIBackgroundFetchResult> completionHandler)
        {
            UINavigationController navigationController = Window.RootViewController as UINavigationController;
            UIViewController topViewController = navigationController.TopViewController;
            if (topViewController is RootViewController) {
                (topViewController as RootViewController).InsertNewObjectForFetch (completionHandler);
                UIApplication.SharedApplication.ApplicationIconBadgeNumber++;
            } else
                completionHandler (UIBackgroundFetchResult.Failed);
        }

This is using PerformFetch but the WillEnterForegroundMethod will accomplish what I am trying to do.

Problem

The problem is I am using a Xamarin.Form Page and don't know how to get access to the Page or the Pages' ViewModel from the App Delegate Class. Any ideas?