https://github.com/dotnet/winforms
https://github.com/Microsoft/microsoft-ui-xaml

2018
https://www.infoq.com/news/2018/12/msft-open-source-wpf-winforms
https://blogs.windows.com/buildingapps/2018/12/04/announcing-open-source-of-wpf-windows-forms-and-winui-at-microsoft-connect-2018/
    http://www.opennet.ru/opennews/art.shtml?num=49718