Question

I see this question a fair amount on SO, and I’ve followed that advice, but I appear to be doing something wrong. The dll seems to load in fine but the object CreateInstance is returning is null.

I have this dll:

namespace Backfill
{
public class Module : Kernel.Module
{
    public override void ModuleStart()
    {
        //Stuff
    }
}
}

In another DLL with a DIFFERENT namespace

namespace Kernel
{

public abstract class Module
{
    public abstract void ModuleStart();
}



public static void KernelStart()
    {
        string load_dll = @"Path to DLL";

        Assembly test_dll = Assembly.LoadFile(load_dll + ".dll");

        Module test_mod = (Module)test_dll.CreateInstance("Kernel.Module");

        test_mod.ModuleStart();
    }
}

(Module)test_dll.CreateInstance("Kernel.Module"); is returning null, though. Any idea why?

Answer 1

(Module)test_dll.CreateInstance("Kernel.Module")

This won’t work. As you specified, the Module class which you’re trying to instantiate (which, I assume, is the one from the first DLL), is not in the Kernel namespace, but in the Backfill namespace. You should therefore have something along these lines:

(Module)test_dll.CreateInstance("Backfill.Module")