c-sharp-telegrambot-v22.4-inlineKeyboard.cs

        static TelegramBotClient _TelegramBotClient;
        static CancellationTokenSource cts = new CancellationTokenSource();
        
        public static void InitTelegramBotClient()
        {
            _TelegramBotClient = new TelegramBotClient("1234567890:AAD98dMandhVhEW4jDEu-LTm6fX9MYL9PKU4",httpClient:default,cts.Token); 
            _TelegramBotClient.OnMessage += _TelegramBotClient_OnMessage;
        }
        
        private static Task _TelegramBotClient_OnMessage(Telegram.Bot.Types.Message message, Telegram.Bot.Types.Enums.UpdateType type)
        {
            if (message.Text is not { } text)
            {

                _TelegramBotClient.SendMessage(message.Chat.Id, "抱歉我們只支持指令", replyMarkup: new ReplyKeyboardRemove());
            }
            //設定 /menu 當作指令
            if (message.Text.ToLower().StartsWith("/menu"))
            {
              
                InlineKeyboardMarkup inlineKeyboard = new(new[]
                {
                    new []
                    {
                        InlineKeyboardButton.WithCallbackData(text: "同意", callbackData: "agree:VoteA"),
                        InlineKeyboardButton.WithCallbackData(text: "不同意", callbackData: "deny:VoteA"),
                    }
                });


                _TelegramBotClient.SendMessage(
               //該用戶或是群組的 Id
               chatId: message.Chat.Id,
               text: message.From.FirstName + " 您好，請選擇你要使用的功能",
               replyMarkup: inlineKeyboard,
               cancellationToken: cts.Token);

            }
            else
            {
                Console.WriteLine($"純文字:" + message.Text);
                _TelegramBotClient.SendMessage(message.Chat, $"Echo: Your Text  is {message.Text}", replyMarkup: new ReplyKeyboardRemove());

            }

            return Task.FromResult<object>(null);

        }