how is the best way to put a folder with miscellaneous

Question

Hi, I have an app, and I have one folder inside the app who has folders with differents .xml
If i include all this folders in a folder called xmlFiles and I want to introduce it into he project when I put the next code
private String assessmentPath = "../xmlFiles/Assessment";
a exception is launched and says that It can be found insade /bin/debug/
I have 2 questions:
1.- How can I include this folders into the project and call it.
2.- If later I want to make a windows app setup how can I include all this files insade the setup.