Question

I have an interesting stack of assemblies I want to put together:

1. Common Assembly (C# or C++-CLI)

   public class MyBase
   {
   public void MethodA()
   { ... }
   private void MethodB()
   { ... }
   protected virtual MethodC()
   { ... }
   }
   

2. Test Code Assemblies (all C++-CLI)

   public class MySpecific : public MyBase{
   protected: override MethodC();
   };
   

3. Test Simulator (C#)

   MySpecific obj = new MySpecific();
   obj.MethodC();
   

While assembly 1 could be C++-CLI to keep things simpler, I’d really like to keep assembly 3 in C#. This is largely an exercise to see if inheritance could be done in either direction, but I also have a real-world case where this stack is useful.

The first problem I find is that the C++-CLI assembly does not compile because it doesn’t recognize MyBase as a class, even though I have a reference to assembly 1 and what looks like the proper namespace.

How do I write classes that are language-portable?

Answer 1

I think you have to declare MySpecific as a managed class like this:

public ref class MySpecific : public MyBase { ... }

See the CLI/C++ documentation for details. You will not be able to use old C++ code without modifications, but I think everything you have in mind should be possible.