One good way of doing this is:
- Create a folder under the app in VS name e.g. “datafiles”
- Add all files to that folder using Add as link in the dialog box after selecting Add existing item on the folder
- Mark all files as Copy if newer (Copy to output directory property)
- Make sure the build action is content
–> when you publish the files will be put in that folder and be a part of the application installation
Good luck!