You need to make two DLLs to use in all your future projects. First off, follow the links in your Start menu to the Exception Management Application Block project. Figure A-1 shows the C# project as loaded in my IDE.
As you can see here, this solution consists of two projects. One takes care of all the code behind the scenes and the other exposes the interfaces that you write to. You need to build both of these projects. They will end up as DLLs that you reference in your data validation projects.