Microsoft unveiled a preview of authoring support in an update to the C#/WinRT tool used to help C# developers more easily work with interfaces to the Windows Runtime, the underlying infrastructure ...

The .NET ecosystem can seem confusing as Microsoft transitions from the old Windows-only .NET Framework to an open-source, cross-platform approach filled with moving parts for a variety of targets.

Based on the image below, and what I have seen written on most blogs in reaction to it and what MS has been saying, it seems that WinRT is assumed to be a sort-of an updated CLR/.NET for writing ...