>From an EXE, I can get the version ID from the interface, such as 1.0.3298.26617. But, for a DLL, such as a DLL for a Web site or a DLL that is included in a Web site project, is there a way to obtain a version ID?

Are you using Application.ProductVersion for an EXE? I think it should work just the same for a DLL since both EXEs and Dlls are assembiles.

Einar