Merging Managed & Unmanaged Assmelby

[Laveer]

Does anyone know of a free tool that would allow me to merge managed and unmanaged code? I created a stand alone lib in c++ that's referencing a c# lib, and as already implied my lib created in c++ was done using unmanaged code. I used some nice software not to long ago, agile.net obfuscator, which allowed me to do so but it was trialed.