static protected bool UserNameAuthenticationPrompt(string realm, bool may_save, ref string user_name, out bool save)
        {
            string password;

            return(UserPasswordDialog.Show(false, realm, may_save, ref user_name, out password, out save));
        }
 static protected bool SimpleAuthenticationPrompt(string realm, bool may_save, ref string user_name, out string password, out bool save)
 {
     return(UserPasswordDialog.Show(true, realm, may_save, ref user_name, out password, out save));
 }