c++ – How to debug the C# COM class?

I have a simple C++ project which uses the CoCreateInstance to access and use some C# code (com-exposed class). The simple code looks like:

// ...
hr = CoCreateInstance(
    CLSID_rclsid,
    NULL, CLSCTX_ALL,
    CLSID_riid,
    reinterpret_cast<void**>(&pMyComServer));

if (SUCCEEDED(hr)) {
    g_hr = hr;
    g_pMyComServer = pMyComServer;
    pMyComServer->GetData();
}
// ...
CoUninitialize();
// ...

The C# code is exposed in very standard way, something like that:

[Guid("D9084CEE-5C65-4AB6-9E10-2718595FAD83")]
[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
[ComVisible(true)]
public interface IPipeClient
{
    void GetData();
}

[Guid("6BEE99C5-CEB5-4B2B-B605-0E6648162AEA")]
[ClassInterface(ClassInterfaceType.None)]
[ComVisible(true)]
public class PipeClient : IPipeClient
{
    public void GetData(){...}
// ...
}

How can I debug the C# called by CoCreateInstance? That is when I open the C# project in debug mode and set breakpoints none is hit. Moreover also using debugging functions like Debug.WriteLine doesn’t print anything in C# project output window. The only way to “debug” this C# I found is using message boxes, which is not handy at all. Is there a way to enable better ways to debug such a “remote” code?