I'm currently developing a WinForm application. In order to inform the client about the improvements and corrections made during the last version, I would like to manage and display a changelog.

I mostly found existing changelog on website (the term changelog is pretty used) or explanation on how to manage the release numbers, which I don't care.

So, these are my questions:

1. How do I manage a changelog (using XML, pure text in the app, etc.) in a desktop application?
2. How do I present it to the user (external website, inside the winform application)?