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

utils references:

http://www.lostechies.com/blogs/chad_myers/archive/2008/07/15/project-anti-pattern-many-projects-in-a-visual-studio-solution-file.aspx

http://www.ssw.com.au/ssw/Standards/Rules/RulesToBetterLargedotNETProjects.aspx

http://blogs.msdn.com/b/ricom/archive/2004/10/18/244242.aspx