IL2CP With WINMD_SUPPORT

Hi, I'm trying to get a simple uwp message dialog working with IL2CPP.

I've chosen IL2CPP as scripting backend and .NET 4.6 as the api compat level.

Then I simply have the following script which is called by a button press, the project compiles and runs correctly but when I press the button the following error comes up.

"NotSupportedException: ....... IL2CPP does not yet support calling this projected method"

Below is my script

Code (CSharp):

1. using UnityEngine;
2.  
3. #if ENABLE_WINMD_SUPPORT
4. using System;
5. using System.Collections.Generic;
6. using Windows.UI.Core;
7. using Windows.UI.Popups;
8. #endif
9.  
10.  
11. public class TestScript : MonoBehaviour
12. {
13.     public void DoSomething()
14.     {
15. #if ENABLE_WINMD_SUPPORT
16.         var messageDialog = new MessageDialog("A Message", "A Title");
17.         messageDialog.Commands.Add(new UICommand("Ok"));
18.         messageDialog.DefaultCommandIndex = 0;
19.         messageDialog.CancelCommandIndex = 0;
20.         messageDialog.ShowAsync();
21. #endif
22.     }
23. }

Thanks

 

Might be a stupid question but where do I file a bug report?