Thank you very much Tim for your reply. That is quite a bit of code to go through. just to verify are you using the N+2 with the 4.3 firmware? According to what i found in my research the coding is a little different with PWM for that board and firmware update. When ive figured out your coding you supplied ill update you if i've figured it out. Thank you again.
If you look at the sample NetduinoPWMLED4.2 it tells you how to hook up a simple LED to D10 and GND and uses PWM to cycle the LED brightness. I loaded the project and then changed it to .NET MF 4.3 and it ran fine on my N+2 with 4.3 loaded.