Unity WSA ads - AccessViolation when calling event from VS

I'm trying to integrate PubCenter interstitial ads within my game.

I have set up an event in my mono behavior script named "AdManager" and calling it like:

Code (CSharp):

1. public static event EventHandler CalledAds;
2.  
3. // called with UI button
4. private void ShowInterstitial()
5. {
6.     if (CalledAds != null)
7.         CalledAds(null, null);
8. }

and in the VS generated project in App.xaml.cs:

Code (CSharp):

1. private InterstitialAd ads;
2. public App()
3. {
4.      this.InitializeComponent();
5.      appCallbacks = new AppCallbacks();
6.      ads = new InterstitialAd();
7.      ads.RequestAd(AdType.Video, appId, adUnitId);
8. }
9.  
10. private void AdManager_CalledAds(object sender, EventArgs e)
11. {
12.      if (ads.State == InterstitialAdState.Ready)
13.           ads.Show();
14. }
15.  
16. private void InitializeUnity(string args)
17. {
18.      /* other generated code */
19.      AdManager.CalledAds += AdManager_CalledAds;
20. }

And this is getting me error: "AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
at AppName.App.AdManager_CalledAds(Object sender, EventArgs e)
at AdManager.ShowInterstitial()"

I've also tried invoking the AdManager.CalledAds += AdManager_CalledAds; on the app thread within the InitializeUnity method, but it didn't help.

Code (CSharp):

1. AppCallbacks.Instance.InvokeOnAppThread(() =>
2. {
3.      AdManager.CalledAds += AdManager_CalledAds;
4. }, false);

Building for WSA Phone 8.1, .NET, Win 8.1 64 bit, testing on Lumia 640.

 

Actually I've just found an example on how to properly do this with UnityEvents here http://docs.unity3d.com/Manual/windowsstore-examples.html

It seems to be working now.