gpio_sample.cs

using Windows.Devices.Gpio;

namespace SampleCode {
    public sealed partial class MainPage { // Dummy

        // GPIO Pin 6, NOT header pin 6 (i.e. not pin 6 on the Pi)
        private const int LISTEN_PIN = 6;
        private GpioPin listenPin;

        // Dummy
        public MainPage() {
            this.InitializeComponent();
        }

        void startListening() {
            // Get an object that represents the device GPIO
            var gpio = GpioController.GetDefault();

            if (listenPin == null) {
                // Open GPIO pin, and set to input mode
                listenPin = gpio.OpenPin(LISTEN_PIN);
                listenPin.SetDriveMode(GpioPinDriveMode.Input);
                listenPin.ValueChanged += Pin_ValueChanged;
            }
        }

        void stopListening() {
            // Check for nullity, and cleanup if necessary.
            if (listenPin != null) {
                listenPin.ValueChanged -= Pin_ValueChanged;
                listenPin.Dispose();
                listenPin = null;
            }
        }

        private void Pin_ValueChanged(GpioPin sender, GpioPinValueChangedEventArgs e) {
            // Do Stuff
        }
    }
}