webbroser 清除COOKIES的解决办法

 [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]

        public static extern bool InternetSetCookie(string lpszUrlName, string lbszCookieName, string lpszCookieData);

然后在DocumentCompleted事件里

 string[] strCookies = webbroser1.Document.Cookie.Split(new char[] { ';' });
                    for (int ci = 0; ci < strCookies.Length; ci++)
                    {
                        string[] strCookie = strCookies[ci].Split(new char[] { '=' });
                        InternetSetCookie(e.Url.ToString(), strCookie[0], "");  
                       
                    }