Modern Telegram.Bot Usage example

bot.cs

using System.Collections.Generic;
using System.Threading.Tasks;
using Telegram.Attributes;
using Telegram.Attributes.Filters;
using Telegram.Bot;
using Telegram.Bot.Types;
using Telegram.Filters;
using Telegram.Handlers;

namespace TestPackage
{
    class Program
    {
        static async Task Main()
        {
            TelegramBotClient bot = new TelegramBotClient("BOT_TOKEN");

            await bot.Dispatcher();
        }


        [MessageHandler]
        [CommandFilter("start")]
        [ReplyFilter(Reverse = true)]
        [PrivateFilter]
        public static async Task CallBack(TelegramBotClient client, Message message, Dictionary<string, dynamic> data)
        {
            await message.ReplyText("OK");
        }
    }
}