public class CookieHelp
    {
        void CreateCookie(string CookieName, string attribute1, string attribute1data, int ExpireDays)
        {
            HttpCookie myCookie = new HttpCooke(CookieName);
            myCookie[attribute1] = attribute1data;
            myCookie.Expires = DateTime.Now.Day(ExpireDays);
            Response.Cookies.Add(myCookie);
        }

        void CreateCookie(string CookieName, string attribute1, string attribute1data, string attribute2, string attribute2data, int ExpireDays)
        {
            HttpCookie myCookie = new HttpCooke(CookieName);
            myCookie[attribute1] = attribute1data;
            myCookie[attribute2] = attribute2data;
            myCookie.Expires = DateTime.Now.Day(ExpireDays);
            Response.Cookies.Add(myCookie);
        }

        void DeleteCookie(string CookieName)
        {
            HttpCookie myCookie = new HttpCookie(CookieName);
            myCookie.Expires = DateTime.Now.AddDays(-1);
            Response.Cookies.Add(myCookie);
        }