Display CodeLens above attributes

No, this is currently not possible.

If you'd like to see this, I suggest you give the product team a shout-out on the Visual Studio UserVoice and post back the link as a comment to this answer. I'd suggest not to move the code lens information, but to suggest the location to be made configurable :).

Though I can't disclose any details, I've seen your feedback before and I know it has been considered, but rejected.

This is an old question but as an update to @jessehouwing this is Visual Studio team answer:

Dear supporters for this suggestion

Thank you for your feedback on this idea.

We designed the Code Lens indicator to be as close to the actual function declaration as possible, to allow you to make a better cognitive connection with it. At one point during the development of Code Lens, we actually tried locating it above the attributes as this suggestion requests. It looked great in simple cases, but unfortunately it started to feel “disconnected” from the declaration when more attributes were added. It really looked strange at around three attributes, but started feeling a bit odd around two.

Here’s a pathological “real world” case which illustrates this -

https://github.com/dotnet/roslyn/blob/master/src/VisualStudio/CSharp/Impl/CSharpPackage.cs#L26

Imagine the indicator above the attributes in this case.

For this reason, we’re declining this suggestion at present.

Thanks! Mark Wilson-Thomas Program Manager, Visual Studio Editor Team

So sadly it won't be fixed, but after reading the whole answer, I have to agree.