Make my application compatible with plugins?

this is not something I am directly familiar with, and I would like to know how to achieve this in C#, so that if I make an application, 3rd parties could create plugins for it...

...Google

http://www.drdobbs.com/cpp/184403942...RSKHWATMY32JVN

And about 100,000 more results

Thanks, I know I should have googled it, but I wasn't exactly sure what I was searching for. apologies.

Of course, rather than re-inventing the wheel you could check out Mono.Addins or the Managed Extensibility Framework to provide the plugin backend. All you need to do then is define the various interfaces/extension points that you want people to be able to extend.

^^ even better.