Why aren't my breakpoints being hit for my MarshalByRefObject object?

Question

I'm working in IIS 7.0 on Windows 7. I have a class that derives from MarshallByRefObject. When I construct it's giving me my proxy as it should. I have breakpoints set on the object in question. The class is called from another class running from a GET request being handled by IIS. The caller is running on the IIS worker process (w3wp.exe) and its breakpoints are being hit (i.e. I have breakpoints at both [1] and [2], but only the breakpoints at [1] are getting hit).

public class Caller
{
    public void Process()
    {
        var callee = new Callee();
        callee.Method(); // [1]
    }
}

public class Callee : MarshallByRefObject
{
    public void Method()
    {
        DoSomething(); // [2]
    }
}

Answer 1

Because the method on your MBR doesn't execute in the same process ( I'm assuming you are not just crossing AppDomains inside a single process ). You only have reference to a proxy but the method body doesn't actually execute in the callers AppDomain.

Check to see that you're attached to the service processes that it could potentially be.