LNK2022 (Duplicate managed types have different visibilities) on MSVS 2012

Question

I\'m porting a solution from MSVS2005 to MSVS2012. The projects are in C++ .NET but use homemade native C++ libraires too. We had no problem building the projects with 2005

Answer 1

Microsoft fixed this issue in hotfix: KB2848798.

It helped me to migrate VS2010 solution to VS2012.

You can download it here

Relevant detail from above hotfix link: CLR issue 1

Symptoms

After you upgrade from Microsoft Visual Studio 2010 to Visual Studio 2012, some C++/CLI projects cannot build, and they report linker errors that resemble the following:

MSVCMRTD.lib(mstart.obj) : error LNK2022: metadata operation failed (801311E4)