How to turn off CodeLens-References

Question

I recently installed Visual Studio 2013 Ultimate. Now, as you know, there is this "n references" above all methods.

When I go to the CodeLens options, I can't disable this single feature, since the checkbox is grayed out.

Options for enabling specific Code Lenses

So how can I disable it?

user_11169107 · Answer

In Visual Studio 2015. Tools > Options. Text Editor > All Languages > CodeLens. Uncheck “Enable CodeLens”