C++/CLI why invisible from managed

Question

I have c++ dll that i am converting to c++/cli. After setting /clr compiler option, my project builds fine. However, when I try to reference native methods by referencing the dll from a c# project, c# project isn't able to find it. Doesn't setting /clr build all source code to MSIL which should be visible from other .net assembly? Why do I have to make a c++/cli wrapper class to make native code visible to c# code?

I am unclear of how c++/cli works really....

Answer 1

The /clr doesn't make your native classes visible to managed code, nor does it compile everything as managed code. It merely allows you to add managed code to your C++ project. This is done via the C++/CLI language extensions (ie: make a ref class instead of a standard class).

The /clr:pure flag does compile everything as managed code (no native), but will require significant source code changes in order to allow you to compile.