Thanks for valuable post!
I also strongly recommend to download iisuCsharp samples at http://www.softkinetic.com/Support/Samples.aspx
set consist of six samples written in C# using iisu API. The samples are:
- Augmented Reality NET
- IID Script Integration NET
- Manipulation and Images NET
- Skeleton NET
- User Management NET
- Volume NET
They will guide you thru the API.
Hope it helps as well/
zofia