C# WebBrowser 쿠키 삭제 방법

public Form1()
{            
    InitializeComponent();

    //Temporary Internet Files
    System.Diagnostics.Process.Start("rundll32.exe", "InetCpl.cpl,ClearMyTracksByProcess 8");

    //Cookies()
    System.Diagnostics.Process.Start("rundll32.exe", "InetCpl.cpl,ClearMyTracksByProcess 2");

    //History()
    System.Diagnostics.Process.Start("rundll32.exe", "InetCpl.cpl,ClearMyTracksByProcess 1");

    //Form(Data)
    System.Diagnostics.Process.Start("rundll32.exe", "InetCpl.cpl,ClearMyTracksByProcess 16");

    //Passwords()
    System.Diagnostics.Process.Start("rundll32.exe", "InetCpl.cpl,ClearMyTracksByProcess 32");

    //Delete(All)
    System.Diagnostics.Process.Start("rundll32.exe", "InetCpl.cpl,ClearMyTracksByProcess 255");

    //'Delete All – Also delete files and settings stored by add-ons 
    System.Diagnostics.Process.Start("rundll32.exe", "InetCpl.cpl,ClearMyTracksByProcess 4351");
 }