c-sharp-telegram-bot-v22.4.cs

       private static Task _TelegramBotClient_OnMessage(Telegram.Bot.Types.Message message, Telegram.Bot.Types.Enums.UpdateType type)
       {
           if (message.Text==null)
           {
               return Task.FromResult<object>(null);
           }

           if (message.Text.ToLower().StartsWith("/"))
           {
               if (message.Text.ToLower().StartsWith("/公告:"))
               {
                   var messageId = _TelegramBotClient.SendMessage(message.Chat, message.Text.Replace("/公告:", "")).Result.Id;
                   _TelegramBotClient.PinChatMessage(message.Chat, messageId);
               }
               else {
                   Stream stream = File.OpenRead(AppDomain.CurrentDomain.BaseDirectory + "oooo.jpg");
                   var res = _TelegramBotClient.SendPhoto(message.Chat, Telegram.Bot.Types.InputFile.FromStream(stream));
               }
               //command handing.

           }
           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);

       }