how to unload managed c++ dll？

A.dll is a native c++ dll, B.dll is a managed c++ dll. A.dll depends on B.dll, so when load A.dll, B.dll is loaded automatically, but a开发者_开发问答fter A.dll is unloaded, B.dll is still loaded. Only A.dll depends on B.dll, why B.dll can't be unloaded? How to unload the managed c++ dll? I'm using vs2010.

Thanks

You cannot unload a managed assembly once it is loaded by the CLR. The only way is to kill the AppDomain.

Using normal officially known approaches this is not possible without unloading AppDomain - at least for .net 4.8 framework.

Theoretically it's possible to load managed .dll as in ram, see following prototype:

https://github.com/tapika/dllloader

But even thus it's possible to release it from native side - most probably it will cause some headache to managed side.