How to call a c++ function that returns a class from c# -

i have functions written in c++ , want use functions in c# project. worked couple of functions in functions in returned class, doesent seem work (i have same class in both sides). created adapter returns class called cprofile :

class cprofile {     public double timestamp;     public int diml, dimr; };  extern "c" __declspec(dllexport) cprofile getprofileadapter(int nint) {     std::cout << "get profile" << std::endl;     profile profile=r->getprofile(nint);     cprofile cprofile;     std::cout << "get time stamp" << std::endl;     cprofile.timestamp=profile.timestamp;     std::cout << "get diml" << std::endl;     cprofile.diml=profile.leftprofile.size();     std::cout << "get dimr" << std::endl;     cprofile.dimr=profile.rightprofile.size();     return cprofile; } 

and in c# project call function :

 class cprofile  {      public double timestamp;      public int diml, dimr;  };   static void main(string[] args)  {       cprofile c = new cprofile();      c = getprofileadapter(0);   }   [dllimport("c:\\ran\\pmcppdllran.dll")]  static extern cprofile getprofileadapter(int nint);