C++ Header implementing a C# Interface

Question

Hi.

Basically I want to know if it is possible to implement a C++ header from a C# interface, because I can't make it work.

Example:

C# Interface: public interface A { void M( ushort u ); }

C++ header: public ref class B : A { void M( unsigned short u ); }

Returns "Error C3766".

Thanks in advance.

Answer 1

The interface must also be public. Try this instead (note 2nd public keyword):

public ref class B : public A { void M( unsigned short u ); }

Answer 2

You have to use the virtual keyword. This compiled as expected:

public ref class B : ClassLibrary1::A {
public:
    virtual void M(unsigned short u) {}
};

Where ClassLibrary1 was the namespace in which the C# interface declaration was made.