add CodeLens even in Visual Studio 2017 Community version
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David Svaiter commented
I really don't understand WHY it's only a Pro/Enterprise feature since the most valuable VS community is really those utilizing the Community version - young people trying to make inovations and CodeLens can help us a lot.
Microsoft if conveniently supporting VS developers around the world can avoid them to migrate for other hardware/software platforms (like Android and Apple).
So, free CodeLens ...