Project Reference Vs File Reference?

Question

References can be added in two ways in a project.

1. Project Reference.
2. File Reference.

But, When to use Project and when to use File refe

Answer 1

At the end, all references are file references, the Project Reference is just a visual studio feature, which is making a reference to a file that is being built with your solution, so whenever you build a new build, the reference is updated automatically without you going copy & paste the files