how to convert an opengl c++ project into a dll to be used by .net core

i have implemented a complete project using opengl to take 2d snapshots from a 3d object. the source file is devided into classes and one class called RunClass, instantiate all the other classes and run the program using a single method called snapshot(const void* pbuffer , size_t psize , vector<float> points , ... ) . i have already tried to make helloWorld c++ dl and made it work using p/invoke mechanism in c# . i need to do the same thing with my opengl.c++ project . ps. the opengl project itself has dependency on bunch of external dlls