How come classes in subfolders in my App_Code folder are not being found correctly?

Question

I am getting the following error when I put class files in subfolders of my App_Code folder:

errorCS0246: The type or namespace name \'MyClassName\' could not be fou

Answer 1

It might not be the correct way but I find it the easiest.

Create the class in the main Folder as usual, then move it with your mouse to your sub-folder. Re-compile and all should be fine.