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

namespace ComPortCapture
{
    class Program
    {

        static void Main(string[] args)
        {
            List<string[]> pname = FindPort("USB");
            foreach (string[] p in pname)
            {
                Console.WriteLine(p[0].ToString());
                Console.WriteLine(p[1].ToString());
            }
            Console.WriteLine("bye\n");
        }


        static List<string[]> FindPort(string pattern)
        {
            // get all the possible registry entries
            List<String> portList = new List<String>();
            RegistryKey rk = Registry.LocalMachine.OpenSubKey("SYSTEM\\ControlSet001\\Enum");
            GetKeys(rk, portList, "Class", "Ports");


            //foreach (String s in portList)
            //    Console.WriteLine("<" + s + ">");

            // get all teh possible serial ports present
            string[] serial = SerialPort.GetPortNames();


            List<string[]> found = new List<string[]>();

            foreach (string p in serial)
                Console.WriteLine("<" + p + ">");

            foreach (string port in serial)
            {
                foreach (String s in portList)
                {
                    string[] a = {port,s};
                    if (s.Contains(port) && s.Contains(pattern))
                        found.Add(a);
                }
            }
            return found;
        }


        static void GetKeys(RegistryKey rkey, List<string> plist, string name, string value)
        {
            // check for any value fields
            if (rkey.ValueCount > 0)
            {
                // get all the value names
                string[] vnames = rkey.GetValueNames();
                // find value name matching the pattern
                foreach (string v in vnames)
                    if (v.Equals(name) && rkey.GetValue(v).Equals(value))
                    {
                        plist.Add(rkey.GetValue("FriendlyName").ToString());
                    }
            }
            // check for any subkeys
            if (rkey.SubKeyCount > 0) 
            {
                // get all the subkey names
                string [] knames = rkey.GetSubKeyNames();
                // loop through all the subkeys recursively
                foreach (string s in knames)
                {
                    RegistryKey key = rkey.OpenSubKey(s);
                    if (key.Equals(null)) continue;
                    GetKeys(key, plist, name, value);
                }
            }
            // end of GetKeys
        }



    }
}