C# - Ermittelt die Proxy Einstellungen von Mozilla Firefox

using System;
using System.Collections;
using System.ComponentModel;
using System.Net;
using System.Net.Sockets;
using System.Xml;
using System.Threading;
using System.Text;
using System.IO;
using Microsoft.Win32;
using System.Diagnostics;

namespace Network.Helper
{
    /// <summary>
    /// Ermittelt die Proxy Einstellungen von Mozilla Firefox
    /// </summary>
    public class MozillaFirefoxProxySettings
    {
        /// <summary>
        /// Adresse des eingestellten Proxyservers.
        /// </summary>
        public static string IP
        {
            get
            {
                try
                {
                    string data = read_key("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders", "AppData");
                    string[] files = System.IO.Directory.GetDirectories(data + "\\Mozilla\\Firefox\\Profiles");

                    foreach (string profile in files)
                    {
                        StreamReader reader = File.OpenText(profile + "\\prefs.js"); // open file
                        for (int i = 0; -1 != reader.Peek(); i++) // read file
                        {
                            string line = reader.ReadLine();

                            // search XXX in user_pref("network.proxy.http", "XXX");
                            if (line.StartsWith("user_pref(\"network.proxy.http\", \""))
                            {
                                line = line.Remove(0, "user_pref(\"network.proxy.http\", \"".Length);

                                line = line.Substring(0, line.Length - 3);
                                return line;
                            }
                        }
                        reader.Close();
                    }

                    throw new Exception("CouldNotFindSettings");
                }
                catch (Exception ex)
                {
                    Debug.WriteLine(ex.ToString() + " StackTrace: " + ex.StackTrace);
                    throw ex;
                }
            }
        }

        /// <summary>
        /// Port des eingestellten Proxyservers.
        /// </summary>
        public static int Port
        {
            get
            {
                try
                {
                    string data = read_key("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders", "AppData");
                    string[] files = System.IO.Directory.GetDirectories(data + "\\Mozilla\\Firefox\\Profiles");

                    foreach (string profile in files)
                    {
                        StreamReader reader = File.OpenText(profile + "\\prefs.js"); // open file
                        for (int i = 0; -1 != reader.Peek(); i++) // read file
                        {
                            string line = reader.ReadLine();

                            // search YYY in user_pref("network.proxy.http_port", YYY);
                            if (line.StartsWith("user_pref(\"network.proxy.http_port\", "))
                            {
                                line = line.Remove(0, "user_pref(\"network.proxy.http_port\", ".Length);

                                return int.Parse(line.Substring(0, line.Length - 2));
                            }
                        }
                        reader.Close();
                    }

                    throw new Exception("CouldNotFindSettings");
                }
                catch (Exception ex)
                {
                    Debug.WriteLine(ex.ToString() + " StackTrace: " + ex.StackTrace);
                    throw ex;
                }
            }
        }

        /// <summary>
        /// Zum Auslesen von Werten aus der Registrierung.
        /// </summary>
        /// <param name="subKey">Sub Key.</param>
        /// <param name="keyName">Key Name.</param>
        /// <returns>Schluesselwert als String oder wenn nicht gefunden "fault".</returns>
        static private string read_key(string subKey, string keyName)
        {
            try
            {
                RegistryKey key = Registry.CurrentUser.OpenSubKey(subKey, true);
                string asdasd = ((string)key.GetValue(keyName, keyName));
                return asdasd;
            }
            catch
            {
                return "fault";
            }
        }
    }
}