What licensing platform have you used? I'm looking to release my first C# program and don't want to spend even more time coding my own way to manage licenses. I've only found a couple so far. One of them being Ayende's Rhino Licensing. It's simple and basic, but it seems to work. Only problem is there isn't much on documentation and I'm still trying to figure out how to implement it in my own program. What have you guys used before and would suggest?