I think it's an exaggeration to say "it doesn't look pretty for Microsoft" especially since the drop in C# can be explained in part by Microsoft actively encouraging C# devs to start writing TypeScript/JavaScript applications. Microsoft has decided the future is TypeScript. If you want C# on mobile your best bet is to look at Xamarin, which is run by Miguel de Icaza of Mono fame. I'm curious how much MS has invested in that company.

Reference: https://www.youtube.com/watch?v=3-5nExkCvAY

Percentages are but one part of a trend. The graph is meaningless without total growth over time, and number of tags per user per tech. It could show anything, i.e. C# growth increase (or decline), even though the percentage overall is in decline.

No, it's Microsoft murdering its flagship product by enforcing retarded rules with WinRT and the Windows Store.

I love C# and I love working on Windows. But no way I'm going to pay money for there "privilege" of publishing open source software!

(you can't install Win 8 apps from anywhere except the store. Must you limited subset of APIs. Must pay yearly subscription to let people download your software. Screw that.)