How do I “Add Existing Item” an entire directory structure in Visual Studio?

Question

I have a free standing set of files not affiliated with any C# project at all that reside in a complicated nested directory structure.

I want to add them in that for

Answer 1

There is now an open-source extension in the Marketplace that seems to do what the OP was asking for:

Folder To Solution Folder

If it doesn't do exactly what you want, the code is available, so you can modify it to suit your scenario.

HTH