Custom uninstaller help

I created a vb.net application in VS 2019. Using Publish I can create an installer and the installer runs file. But, when the program is removed from Windows Add/Remove, the folder the program is installed in is not removed. Also my program writes a few files to the same folder that I would like to remove upon uninstall.

I'm thinking this is a custom uninstall action. But I do not know how to accomplish this.

Anyone have any step by step instructions on how to do this? I can't find any good help docs on this.

I'm assuming this involves adding an installer class?

Thanks.