Output Compare on Fez Hydra?

I need to use output compare on Fez Hydra. For this i need to know which pin in socket 4 should i use?
I used output compare in fez panda and it worked for my needs (code used in panda as below).

Cpu.Pin redLed = (Cpu.Pin)FEZ_Pin.Digital.Di2;
OutputCompare oc = new OutputCompare((Cpu.Pin)redLed, false, 5);

Not sure if the same will work for hydra. Which pin should i use in hydra? I have the led in the socket 4.

Also when i add the Output compare code, i get the following runtime error.

Exception System.Exception - CLR_E_DRIVER_NOT_REGISTERED (2)

#### Message: 
#### Microsoft.SPOT.Hardware.NativeEventDispatcher::.ctor [IP: 0000] ####
#### GHIElectronics.NETMF.System.InternalEvent::.cctor [IP: 0014] ####

An unhandled exception of type ‘System.Exception’ occurred in Microsoft.SPOT.Hardware.dll

http://www.ghielectronics.com/offers/

OutputCompare is part of the premium libraries but as Hydra is open source, feel free to contribute this feature.

Is there any other way i can blink an led (send signal) in micro seconds. The timers function has a minimum of milliseconds.

PWM does what you want… but the question is what are you trying to achieve? Blinking a LED at high frequency will not be visible to the naked eye, you just get a dimmed look.

The signal will be sent to another circuit which can detect micro second signals. PWM works except if I want to sent a ON for 200 microsecond just once. I need to stop sending signal after that time

Timer and Timer Tick event did the job