C# .NET code for Raspberry Pi GPIO Traffic Lights Article

Program.cs

using System;
using System.Device.Gpio;
using System.Threading;

namespace trafficlights
{
    class Program
    {
        static void Main(string[] args)
        {
            const int redPin = 9;
            const int amberPin = 10;
            const int greenPin = 11;
  
	    GpioController gpio = new GpioController();
            gpio.OpenPin(redPin, PinMode.Output);
            gpio.OpenPin(amberPin, PinMode.Output);
            gpio.OpenPin(greenPin, PinMode.Output);

            void AllLightsOff()
            {
                gpio.Write(redPin, PinValue.Low);
                gpio.Write(amberPin, PinValue.Low);
                gpio.Write(greenPin, PinValue.Low);
            }

            Console.CancelKeyPress += delegate {
                AllLightsOff();
            };

            AllLightsOff();

            while (true) {
                // Red
                gpio.Write(redPin, PinValue.High);
                Thread.Sleep(3000);

                // Red and amber
                gpio.Write(amberPin, PinValue.High);
                Thread.Sleep(1000);
  
                // Green
                gpio.Write(redPin, PinValue.Low);
                gpio.Write(amberPin, PinValue.Low);
                gpio.Write(greenPin, PinValue.High);
                Thread.Sleep(5000);

                // Amber
                gpio.Write(greenPin, PinValue.Low);
                gpio.Write(amberPin, PinValue.High);
                Thread.Sleep(2000);

                // Amber off
                gpio.Write(amberPin, PinValue.Low);
            }
        }
    }
}