what is the best practice to implement an update ability (partial update may be) for desktop application

I want to develop my desktop application in a way that makes me able to provide update packages like visual studio does; in this way user shouldn't download the whole application and install it again to update just a bit of it.

and if I want to provide some feature packages (like visual studio does again) and even plug-ins what should I do in my design?

by the way, for extra information I use C#, Wpf, Prism, and application has no database, it's just about some processing and presenting result to the user.