Custom .NET DLLs into the Add Reference Dialog

However, if you want to show VS2008 to display your custom DLLs within in the list maintained by the Add Reference dialog, all you need to do is place a copy of the DLL within the PublicAssemblies folder located under C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE. Once you have done so, look at Add Reference Dialog, it's showing your DLL.

Note: Not always C:\... Go to your Visual Studio installation drive