StatHat is AMAZINGLY simple and super fast.
I just started testing their stuff out for out .net WinForm client app and it is looking great.
All you have to do is include one file into your solution, and you can start logging stats right away
https://www.stathat.com/
They have event/action stats and they also have running total stats.
They have support for many different libraries. I literally had this up and running in 2 minutes from sign up to first logged event.