Register to C# event from C++/CLI - events

Question

I'm writing C++ code that calls C# code. The C# may need to invoke methods back in the C++ code. If both parts were C# I think I would use following mechanism. Please note I pass EventHandler from ShouldBCpp to Csharp instead of registering in ShouldBCpp since ShouldBCpp does not know what csharp points to (& can't change CsharpBase).
public abstract class CsharpBase
{
public abstract void SomeMethodDoingActionInB();
}
public class Csharp : CsharpBase
{
public Csharp(EventHandler f)
{
MySpecialHook += f;
}
public event EventHandler MySpecialHook;
public override void SomeMethodDoingActionInB()
{
if (MySpecialHook != null)
MySpecialHook(this, null);
}
}
public class ShouldBCpp
{
public CsharpBase csharp;
public ShouldBCpp()
{
csharp = new Csharp(NotificationFromClassB); // actually using Activator::CreateInstance
}
public void NotificationFromClassB(object sender, EventArgs e)
{
}
public void Go()
{
csharp.SomeMethodDoingActionInB();
}
}
class Program
{
static void Main(string[] args)
{
ShouldBCpp shouldBCpp = new ShouldBCpp();
shouldBCpp.Go();
}
}
Question is how to write ShouldBCpp in C++/CLI. Bonus points for using delegate :)
Thank you

Answer 1

A simple translation to C++/CLI would look like this:
public ref class IsCppCLI
{
public:
CsharpBase^ csharp;
IsCppCLI()
{
csharp = gcnew Csharp(gcnew EventHandler(this, &IsCppCLI::NotificationFromClassB));
// You didn't show your Activator code,
// but I believe it would translate to C++/CLI as this:
csharp = dynamic_cast<CsharpBase^>(
Activator::CreateInstance(
Csharp::typeid,
gcnew array<Object^> {
gcnew EventHandler(this, &IsCppCLI::NotificationFromClassB)}));
}
void NotificationFromClassB(Object^ sender, EventArgs^ e)
{
}
void Go()
{
csharp->SomeMethodDoingActionInB();
}
}