c++ native code using an abstract class into a wrapper - c++-cli

Question

I need to implement a c# GUI for my unmanaged code. So i have designed a wrapper to deal with my native code, but this does not work porperly.
I have a method which requires to make an instance to an abstract class and i'm not sure how to deal with it.
First for my C++ classes i used an abstract class:
class Interface abstract
{
public: Interface (void);
public: ~Interface (void);
public: virtual double Get() = 0;
};
And i used a ClassSpecific1 and a ClassSpecific2 depending on my current application, and i inherited the functions from the abstract class for each one.
class ClassSpecific1 : public Interface
{
public: ClassSpecific1 (void);
public: ~ClassSpecific1 (void);
private: double Get();//based on the abstract class
};
class ClassSpecific2 : public Interface
{
public: ClassSpecific2 (void);
public: ~ClassSpecific2 (void);
private: double Get();//based on the abstract class
};
Later i used another class, it works as a general class and uses the ClassSpecific1 or the ClassSpecific2 with an instance of the abstract class.
class ClassAPI
{
public: ClassLaserAPI(void);
public: ~ClassLaserAPI(void);
public: double Get(Interface *objToInterface);//This Get() calls the Get() in ClassSpecific1 or ClassSpecific2
};
Until here everything seems all right. I have tested everything and works as expected. My big problem is that i don't know how to make my method Get(Interface *objToInterface) from ClassAPI into my wrapper. Do i need to make a wrapper for my abstract class first in order to be able to create the instance**(Interface *objToInterface)** on the wrapper?
This is what i have so far, i hope someone can give me some help, i'm getting lost in how to proceed.
namespace API
{
public __gc class APIManaged
{
public: APIManaged(void);
public: ~APIManaged(void);
/** Unmanaged pointer to ClassAPI
*
*/
private: ClassAPI __nogc* cAPI;
public: double Get(Interface __nogc* objInterface);
};

Answer 1

I'm also having the same problem and got it resolved using this topic:
C++/CLI Inheriting from a native C++ class with abstract methods and exposing it to C#
I too am using an unmanaged abstract class and got things working by following the tips outlined in the link. I ended up with a few errors to fix and fixed them by changing my linker options in my unmanaged projects to not compile with /clr and only the wrapper project compiles using /clr.
Posting your output errors may help clarify some of the troubles you are having...