我怎么知道我的电脑打开了多少网页？

using System;

using System.Windows.Forms;

using SHDocVw;

namespace WindowsApplication35

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            ShellWindowsClass shellWindows = new ShellWindowsClass();

            foreach (InternetExplorer ie in shellWindows)

            {

                string filename = System.IO.Path.GetFileNameWithoutExtension(ie.FullName).ToLower();



                if (filename.Equals("iexplore"))

                {

                    Console.WriteLine(ie.LocationURL);

                }

            }

        }



         

    }