Adding a Database Reference to an external database
Managing database projects within Visual Studio can be extremely confusing. There seems to be very little information out there on how to use the provided project templates properly, and what little there is is often cryptic and clearly written by insiders. Watch this blog for a forthcoming article which will hopefully clear up some of this confusion, but for now I wanted to share what I've learned about referencing other, existing databases from within your Visual Studio database project. With the 2010 release, Visual Studio's database project templates appear to want you to encapsulate your entire database within the project