It enables someone else (a system administrator, microsoft patch, etc.) to redirect it to a new version without your intervention if a security issue is identi

It enables someone else (a system administrator, microsoft patch, etc.) to redirect it to a new version without your intervention if a security issue is identified in the version you have shipped with your application. It's actually a very sophisticated system that allows any number of versions of the same dll to be used simultaneously within the system. It is also a nightmare for unsuspecting developers when it goes wrong.