namespace WebBrowserMemoryTest

{

    public partial class Form1 : Form

    {

        private int _Pages;

        public Form1()

        {

            InitializeComponent();

            webBrowser1.Navigate("http://www.google.com");

        }

        private void startButton_Click(object sender, EventArgs e)

        {

            _Pages = 0;

            timer1.Start();

        }

        private void stopButton_Click(object sender, EventArgs e)

        {

            timer1.Stop();

        }

        private void timer1_Tick(object sender, EventArgs e)

        {

            HtmlElement next = webBrowser1.Document.GetElementById("pnnext");

            if (_Pages <= 90)

            {

                if (null != next)

                {

                    string href = next.GetAttribute("href");

                    webBrowser1.Navigate(href);

                    _Pages++;

                }

                else

                {

                    timer1.Stop();

                    MessageBox.Show("Next button not found");

                }

            }

            else

            {

                timer1.Stop();

                MessageBox.Show("Done");

            }

        }

        private void goButton_Click(object sender, EventArgs e)

        {

            webBrowser1.Navigate(textBox1.Text);

        }

        private void freeMemButton_Click(object sender, EventArgs e)

        {

            MemoryManagement.FlushMemory();

        }

    }

    public class MemoryManagement

    {

        [DllImport("kernel32.dll")]

        public static extern bool SetProcessWorkingSetSize(IntPtr proc, int min, int max);

        public static void FlushMemory()

        {

            GC.Collect();

            GC.WaitForPendingFinalizers();

            if (Environment.OSVersion.Platform == PlatformID.Win32NT)

            {

                SetProcessWorkingSetSize(System.Diagnostics.Process.GetCurrentProcess().Handle, -1, -1);

            }

        }

    }

}