I have several Business Object Libraries as well as other custom assemblies.  What is the best way to ensure that if one of these changes, a project that references it automatically gets updated with the current DLL?  I've been removing and re-adding these references (if they've changed) each time I compile a project.

Related to this question, I am referencing the Debug versions of these assemblies while I'm in development so that I can debug the DLLs as well as the project that references them.  Is there an easy way to make sure that when the project is built for release it points to the release versions of the DLLs?

Thanks!