C# Webbrowser Control: loop through a List

Question

hi all,
       
        i am using webbrowser control in windows aplication . i was writting some logic in webBrowser1_DocumentCompleted() method
i am using list to navigate webbrowser control but web browser control not wait for first FanMailSiteName in list it process second..third and so on 
here is my code snippet please help ASAP



foreach (AdvisorDetail ad in adList)
                {
                    DownloadFilePath = ad.Path;
                    Username = ad.UserName;
                    Password = ad.Password;
                    FanMailSiteName = ad.URL;
                    Advisorname = ad.AdvisorName;
 SignIN();
{
 webBrowser1.Navigate(FanMailSiteName);
}
                }
 private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
//some logic here
}