I have recently begun securing some of our applications here and there with Microsoft's Anti-XSS library. When I have a Solution in VisualStudio, I just choose "Add Reference..." and put it in the Solution. Easy.
But before I really knew how to use VisualStudio (like I really know it now?), I never made Solutions; I just went in and created ASPX files and CS files and so on. Now I need to use the Anti-XSS classes in some of these non-Solution ASPX and CS files. How can I add reference to a DLL when there's no Solution?