Irrlicht.Net is no longer developed or supported, Irrlicht.Net Cross Platform is a much more complete wrapper. Please ask your C# related questions on their forums first.
How do I load an animated mesh and switch between the stored animations ? How do I copy/append animations from one mesh to another with a matching skeleton ? I can't even get meshes to animate apart from the .md2 that came with the irrlicht download
I'm using .X format meshes, though I can probably convert to another format if it works better.