At the time the .NET library was originally written, there was an issue with the USB driver that did not allow for asynchronous reading and writing, and we included a workaround for this.  It has since been reported that the USB portions of the code do not work with current versions of the .NET framework. 

It may now be possible to use the standard USB driver instead of the workaround in the MakingThings library.  Another alternative, of course, is to use the Ethernet interface to the Make Controller.  If anybody has luck
with the standard driver, please contact us and we can integrate the changes into the library.