Release mode of UWP error

When building on release mode it errors . This is mainly a compiler problem. To workaround, this don't use native mode, until it is fixed. Keeping here for reference.

```System.Runtime.InteropServices.SpinWaitExtensions' was not found.```

For info: 
http://mag.autumn.org/Content.modf?id=20180214111420

A workaround to try is to create a complete new project. and port everything