You can use FileSystemWatcher instead of checking every x seconds. You will be notified whenever a file or folder in the given folder is created,deleted or changed.
Alliteratively, you can you the FileSystemWatcher API. It trigger an event when the folder changes. This save your battery life if you are on laptop.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.