Managed C++/CLI

interface class IFoo
{
public:
	void foo();
};

ref class FooBase : public IFoo
{
public:
	virtual void foo() sealed = IFoo::foo
	{
		Console::WriteLine("FooBase");
	}
};

ref class FooDerived : public FooBase
{
public:
	// derivedFoo is the implementation of IFoo::foo
	virtual void derivedFoo() = IFoo::foo
	{
		Console::WriteLine("FooDerived");
	}
};

int main(array<System::String ^> ^args)
{
	FooBase^ fb = gcnew FooBase();
	fb->foo();					// Prints "FooBase"

	FooDerived^ fd = gcnew FooDerived();
	fd->foo();					// Prints "FooBase"

	IFoo^ iface = dynamic_cast<IFoo^>(fb);
	iface->foo();					// Prints "FooBase"

	iface = dynamic_cast<IFoo^>(fd);
	iface->foo();					// Prints "FooDerived"

    return 0;
}

ref class FooDerived : public FooBase
{
public:
	virtual void foo() new = IFoo::foo
	{
		Console::WriteLine("FooDerived");
	}
};

FooDerived^ fd = gcnew FooDerived();
fd->foo();					// Prints "FooBase"

virtual void derivedFoo() = IFoo::foo

1>.\mfc_mm_2008.cpp(38) : error C2059: syntax error : 'string'
1>.\mfc_mm_2008.cpp(38) : error C2091: function returns function
1>.\mfc_mm_2008.cpp(39) : warning C4569: 'IFoo::foo' : no members match the signature of the explicit override
1>.\mfc_mm_2008.cpp(39) : error C3671: 'FooDerived::foo' : function does not override 'IFoo::foo'

#ifdef _DEBUG
#define new DEBUG_NEW
#endif