Thanks you for responding Chris!
I need to send an unix command via ssh protocol... for instance, send shutdown signal if some conditions become true like high temperature in a device which resides in a remote cluster.
IMPORTANT DATA: Some months ago I have accomplished working with the Renci.Ssh library in a NetduinoPlus application but it was over a different scenario. That time, the SO was Windows 7 (32bits) and the framework was Netduino SDK 4.1 (32bits).
Now, I am working over Windows 8 and Netduino SDK 4.1 (64bits). I dont know if this has any importance but I remember that I could build the solution with the Renci.Ssh reference and it worked/ran correctly.