I'm frightened by this. Unity is the biggest push for C# other than Microsoft though. Hopefully Unity would never sell because once it is owned by a single platform, that will get preference and the whole multi-platform jig is up. That would further fragment because other platforms wouldn't trust Microsoft. Unless of course they sell off Xbox like Elop wanted to do. However Unity strongly relies on Mono which will now be run by Microsoft if this goes through. Either happening will cause some customer rage.