///--------------------------------------------------------------------------------------------------------
        ///
        protected async Task SendMessage(long requesterId, string msg, ParseMode parseMode = ParseMode.Html)
        {
            if (string.IsNullOrEmpty(msg))
            {
                return;
            }

            if (requesterId >= 0)
            {
                await TelegramBot.Bot.SendTextMessageAsync(requesterId, msg, parseMode);
            }
            else
            {
                await UserList.ForeachSendMsg(msg, parseMode);
            }
        }