C++ library with .NET core vscode on ubuntu 19.04 x86_64?

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How can I create a minimal Visual Studio Code 2.2 workspace with:
1. C++ library project (if possible *.so - shared library, if not *.a to use with C#)
2. (If required) something instead of C++/CLI wrapper project(it is linux os no MS C++/CLI)
may be wrapper on C# side?
3. C# Application project (using the C++ library)

Will be happy to get links to blogs and tutorials or a simple instructions set to create this software scenario (please only short ones without third party dll's/.so if possible)

Thanks

What I have tried:

1. I have done it with Windows and .Net C++/CLI/CLR wrapper but cant find simple technique for Linux Ubuntu 19.04 host with Visual Studio Code.

2. I installed successfully Visual Studio Code with Core Net C++ extension CMake Tools.

3. I built C# application and Lunched it successfully.

4. I built C++ G++-8_x86_64 CMake project and Lunched it successfully with test driver based on Boost Test library.