Solved Plugin development steps?

Hello, I was just wanting to know what is required - obviously apart from knowledge on C# - to know to be-able to start creating plug-ins and editing current plug-ins to a certain liking.

Thanks, Owen.

EDIT: Can 'lua' be used to create plug-ins instead of using C# and if so how much more or less restricted are the capabilities compared to C#.

 

Aww, don't discontinue Lua.

And thanks for the links also.