I have a dll created by MS V C++ version 6 Class. The original files it was
based on were Borland and so this dll was created to use the Borland files
in a MS environment. However I am trying to access it in a .NET
application by adding it as a reference, and it keeps complaining that "a
reference to CDFSvrMS.dll could not be added. This is not a valid assembly
or com component."

I have tried to load up the MS VC++ version 6 project in .NET which seems to
automatically convert the project. However when the dll is re-compiled it
still does not work!

I have also tried to create a new dll from scratch, based on the cpp but it
complains "error C2872: 'IServiceProvider' : ambiguous symbol"

Any suggestions on how to get my dll working.