How to add a dll project in C # written in C ++?

Question

There is a dll library. It also has the files lib, def, and header h. How to connect all this stuff to a C # project?

InterOp msdn.microsoft.com/en-us/library/2x8kf7zx.aspx Pinvoke pinvoke.net
As I understand it, this is how to call dll in C ++ made in C #.
It is the native DLL call from the managed code msdn.microsoft.com/ru-ru/library/aa288468
Here's another msdn.microsoft.com/ru-ru/library/55d3thsc.aspx

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