Autodetect Arduino board on Windows

AutodetectPorts.cs

using Microsoft.Win32;
using System.Collections.Generic;
using System.IO.Ports;

namespace SerialManagement
{
    public static class AutodetectPorts
    {
        public class ArduinoPort
        {
            public string portName;
            public string boardName;
        }
        
        public static List<ArduinoPort> allPorts;

        /// <summary>
        /// Get Arduino serial port by board name
        /// </summary>
        /// <param name="boardName"></param>
        public static string GetPortByBoardName(string boardName)
        {
            if (allPorts == null)
                allPorts = GetPorts();

            foreach(ArduinoPort ap in allPorts)
            {
                if (ap.boardName.Contains(boardName))
                    return ap.portName;
            }
            return "";
        }

        /// <summary>
        /// Get all Arduino ports which are connected to serial ports
        /// </summary>
        public static List<ArduinoPort> GetPorts()
        {
            return ValidatePorts(FindArduinoPorts());
        }

        /// <summary>
        /// Discover all Arduino ports
        /// </summary>
        private static List<ArduinoPort> FindArduinoPorts()
        {
            string friendlyName;
            string portName;

            List<ArduinoPort> arduinoPorts = new List<ArduinoPort>();
            RegistryKey rk1 = Registry.LocalMachine;
            RegistryKey rk2 = rk1.OpenSubKey("SYSTEM\\CurrentControlSet\\Enum");
            foreach (string s3 in rk2.GetSubKeyNames())
            {
                RegistryKey rk3 = rk2.OpenSubKey(s3);
                foreach (string s in rk3.GetSubKeyNames())
                {
                    if (s.Contains("VID") && s.Contains("PID"))
                    {
                        RegistryKey rk4 = rk3.OpenSubKey(s);
                        foreach (string s2 in rk4.GetSubKeyNames())
                        {
                            RegistryKey rk5 = rk4.OpenSubKey(s2);
                            friendlyName = (string)rk5.GetValue("FriendlyName");

                            if (friendlyName != null && friendlyName.Contains("Arduino"))
                            {
                                RegistryKey rk6 = rk5.OpenSubKey("Device Parameters");
                                portName = rk6 != null ? (string)rk6.GetValue("PortName") : "";
                                if (!string.IsNullOrEmpty(portName))
                                {
                                    ArduinoPort arduinoPort = new ArduinoPort();
                                    arduinoPort.portName = portName;
                                    arduinoPort.boardName = friendlyName;
                                    arduinoPorts.Add(arduinoPort);
                                }
                            }
                        }
                    }
                }
            }
            return arduinoPorts;
        }

        /// <summary>
        /// Validate discovered ports
        /// </summary>
        private static List<ArduinoPort> ValidatePorts(List<ArduinoPort> comports)
        {
            List<ArduinoPort> validComports = new List<ArduinoPort>();
            if (comports.Count > 0)
            {
                foreach (string s in SerialPort.GetPortNames())
                {
                    foreach (ArduinoPort ap in comports)
                    {
                        if (ap.portName == s)
                            validComports.Add(ap);
                    }
                }
            }
            return validComports;
        }
    }
}