Should the folders in a solution match the namespace?

Question

Should the folders in a solution match the namespace?

In one of my teams projects, we have a class library that has many sub-folders in the project.

Project

Answer 1

I think the standard, within .NET, is to try to do it when possible, but not to create unnecessarily deep structures just to adhere to it as a hard rule. None of my projects follow the namespace == structure rule 100% of the time, sometimes its just cleaner/better to break out from such rules.

In Java you don't have a choice. I'd call that a classic case of what works in theory vs what works in practice.