I assume Microsoft hired that guy, because they started to be more towards Open Source and Linux.

In February 2016, Xamarin announced being acquired by Microsoft.[14] One month later at the Microsoft Build conference, it was announced that the Mono Project would be relicensed to MIT, Visual Studio would include Xamarin (even the free versions) without restrictions, and Xamarin SDKs would be opensourced.

- https://en.wikipedia.org/wiki/Miguel_de_Icaza#GNOME,_Ximian,_Xamarin_and_Mono