Plug-ins and Late binding

[ThunderMusic]

Hi,
I have some code to load some plug-ins, but the code requires me to know
the name of the class to load (here: SamplePlugin, derived from IPlugin) :

using System;
using System.Reflection;

public class Driver
{
static void Main()
{
Assembly assembly = Assembly.LoadFrom ("myplugin.dll");
Type t = assembly.GetType ("SamplePlugin");
IPlugin plugin = (IPlugin) Activator.CreateInstance(t);
plugin.SayHello();
}
}

The problem is, I don't want to have to know the name of the class I want to
load... I want to load the new module and get an instance of the class that
derives IPlugin. Is there a way to do so?

In C++ for the same purpose, I had a win32 dll with an extern function that
returned an instance of the contained class, so I loaded the dll, called the
function and I was ready to proceed. Is there something similar I can do
with .NET class libraries?

thanks