DotNet中获取系统信息（一）

    前几天发了一张用C#获取系统信息的随笔，得到很多高人的指点，获益良多啊！
    这两天又抽空重构了一下，使用了singleton模式，并支持读取多CPU和多网卡的信息（未使用WMI），但没办法测试，不知道行不行！请高手指导！
    全过程都使用了TestDriver.NET（以前叫NUnitAddin）和ReSharper1.0，确实不错。尤其是ReSharper，重构功能比Together for vs.net 2.0的好用多了，其它功能也不错（所以抛弃了VAX和CodeRush，多了太耗资源）。
    代码较多，先发主要的：SystemInfomation.cs

using System;
using System.Net;
using Microsoft.Win32;

namespace SystemInfomation
{
    public struct RunnedTime
    {
        public int hour;
        public int minute;
        public int second;
    }
    
    /**//// <summary>
    /// Summary description for GetInfo.
    /// </summary>
    public class SystemInfomation
    {    
        private static SystemInfomation instance;
        private const string processorKey = @"HARDWARE\DESCRIPTION\System\CentralProcessor\";
        private const string biosKey = @"HARDWARE\DESCRIPTION\System";
        private const string networkKey = @"SOFTWARE\Microsoft\Windows NT\CurrentVersion\NetworkCards\";
//        private static RegistryKey processor;
//        private static RegistryKey bios;
//        private static RegistryKey network;

        /**//// <summary>
        /// Get subkeys of processor registry.
        /// </summary>
        /// <returns>subKeys:stirng[]</returns>
        private string[] GetProcessorKey()
        {
            try
            {
                RegistryKey processor = Registry.LocalMachine.OpenSubKey(processorKey);
                return processor.GetSubKeyNames();
            }
            catch (Exception e)
            {
                throw(e);
            }
        }

        /**//// <summary>
        /// Get bios registry.
        /// </summary>
        /// <returns>Registry</returns>
        private static RegistryKey GetBiosKey()
        {
            return Registry.LocalMachine.OpenSubKey(biosKey);
        }

        /**//// <summary>
        /// Get subkeys of netword card registry.
        /// </summary>
        /// <returns>subKeys:string[]</returns>
        private string[] GetNetworkKey()
        {
            try
            {
                RegistryKey network = Registry.LocalMachine.OpenSubKey(networkKey);
                return network.GetSubKeyNames();
            }
            catch (Exception e)
            {
                throw(e);
            }
        }

        public SystemInfomation()
        {
            //
            // TODO: Add constructor logic here
            //
        }

        /**//// <summary>
        /// Singleton Model
        /// </summary>
        /// <returns>instance:SystemInfo</returns>
        public SystemInfomation GetInstance()
        {
            lock (instance)
            {
                if (instance == null)
                {
                    instance = new SystemInfomation();
                }
            }
            return instance;
        }

        /**//// <summary>
        /// Get OS version.
        /// </summary>
        /// <returns>os_version:string</returns>
        public string GetOSVersion()
        {
            return System.Environment.OSVersion.ToString();
        }

        /**//// <summary>
        /// Get machine name
        /// </summary>
        /// <returns>machine_name:string</returns>
        public string GetMachineName()
        {
            return System.Environment.MachineName.ToString();
        }

        /**//// <summary>
        /// Get user name of using OS
        /// </summary>
        /// <returns>user_name:string</returns>
        public string GetUserName()
        {
            return System.Environment.UserName.ToString();
        }

        /**//// <summary>
        /// Get all logic drivers of machine
        /// </summary>
        /// <returns>logic_drivers:string[]</returns>
        public string[] GetLogicalDrives()
        {
            return System.Environment.GetLogicalDrives();
        }

        /**//// <summary>
        /// Get IP Address of machine
        /// </summary>
        /// <returns>ip_addr:IPAddress[]</returns>
        public IPAddress[] GetIPAddr()
        {
            IPHostEntry ipEntry = Dns.GetHostByName(Dns.GetHostName());
            return ipEntry.AddressList;
        }

        /**//// <summary>
        /// Get Domain name
        /// </summary>