C++ Interop: How do I call a C# class from native C++, with the twist the class is non-static? -

i have large application written in native c++. have class in c# need call.

if c# class static, trivial (there's lots of examples on web) - write mixed c++/cli wrapper, export interfaces, , you're done.

however, c# class non-static, , can't changed static has interface (the compiler generate error if attempt make c# class static).

has run problem before - how export non-static c# class native c++?

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update 2010-11-09

final solution: tried com, worked nicely didn't support structures. so, went c++/cli wrapper, because absolutely needed able pass structures between c++ , c#. wrote mixed mode .dll wrapper based on code here:

• how to: marshal arrays using c++ interop

• how to: marshal structures using c++ interop

as target class non-static, had use singleton pattern make sure instantiating 1 copy of target class. ensured fast enough meet specs.

contact me if want me post demo project (although, fair, i'm calling c# c++, , these days people want call c++ c#).

c++/cli or com interop work non-static classes static. using c++/cli reference assembly holds non-static class , can use gcnew obtain reference new instance.

what makes think not possible non-static class?

edit: there example code here.

using namespace system;  public ref class csquare { private:     double sd;  public:     csquare() : sd(0.00) {}     csquare(double side) : sd(side) { }     ~csquare() { }      property double side     {     double get() { return sd; }     void set(double s)     {         if( s <= 0 )         sd = 0.00;         else         sd = s;     }     }      property double perimeter { double get() { return sd * 4; } }     property double area { double get() { return sd * sd; } } };  array<csquare ^> ^ createsquares() {     array<csquare ^> ^ sqrs = gcnew array<csquare ^>(5);      sqrs[0] = gcnew csquare;     sqrs[0]->side = 5.62;     sqrs[1] = gcnew csquare;     sqrs[1]->side = 770.448;     sqrs[2] = gcnew csquare;     sqrs[2]->side = 2442.08;     sqrs[3] = gcnew csquare;     sqrs[3]->side = 82.304;     sqrs[4] = gcnew csquare;     sqrs[4]->side = 640.1115;      return sqrs; }