I have a database solution in Visual Studio Enterprise 2019 which consists of four database projects. My databases live on a shared SQL Server instance that hosts multiple solutions. My database projects take advantage of objects on that instance in another database that I do not control, and is not managed in a VS solution or project.
Of course I'm getting a ton of unresolved reference errors when I attempt to build my solution because I call tables and functions in that database. How can I construct a reference to that common, unmanaged database and resolve these errors?