Led.dispose() turns on led...why?

This is a very basic question so hopefully I'll get a quick basic answer...

 

My function blinks the led awesome but when I dispose of the led object the led turns back on and stays on until I call the function again and blink it, but then again once led.dispose(); is run the led turns on.

        public void Blink_Onboard_Led(int blinks)        {            // Blink LED once if blinks is negative or too large             if (blinks < 1 || blinks > 1000) { return; }            OutputPort led = new OutputPort(Pins.ONBOARD_LED, false);                        for (int i = 0; i < blinks; i++)            {                         led.Write(true);                Thread.Sleep(250);                led.Write(false);                Thread.Sleep(250);            }            led.Dispose();        }

What should I do to keep the led off?

It so happens that the pin you are claiming is electrically connected to an on-board LED. When disposing the pin, it reverts to its default config and usage. I'm not sure but, could it be the pin (and thus the LED) is used as a power indicator on your board?

Hi Jamo, Are you using a Netduino 1 or a Netduino 2? On Netduino 1, the ports revert to "input, pull-up" mode when you dispose them...which would make the LED turn on once it was disposed. It's put into output low mode during initialization--which is why it's turned off by default. Chris

Hi Chris, it's a Netduino 1.

 

Thanks for letting me know that, at least now I know what it is.

 

Cheers mate,

James