Thanks for the help, dankline. You got me going down the correct path, and I did get it working. But I am not totally sure how. I uninstalled and installed almost every bit of related software, reflashed my Netduino 2, etc. and eventually things started working. I wish I knew the sequence!
It sort of feels like it may have been related to not having installed the DFU stuff before installing the .Net MF, etc. But I went through so many iterations I cannot be sure.Go to the full post