using System;

using System.Threading;

using System.Threading.Tasks;

using Telegram.Bot; 

using Telegram.Bot.Polling;

using Telegram.Bot.Types; 

​

namespace TelegramBot

{

    internal class Program

    {

        private static ITelegramBotClient _telegramBot = new TelegramBotClient("yourToken"); 

        static void Main(string[] args)

        {

            var cancellationToken = new CancellationTokenSource().Token; 

            var receiverOptions = new ReceiverOptions 

            {

                AllowedUpdates = { },

            };

            _telegramBot.StartReceiving(

                UpdateHandlerAsync,

                ErrorHandlerAsync,

                receiverOptions,

                cancellationToken

            );

​

            Console.ReadLine();

        }

        public static async Task UpdateHandlerAsync(ITelegramBotClient telegramBot, Update update, CancellationToken cancellationToken)

        {

            if (update.Type == Telegram.Bot.Types.Enums.UpdateType.Message)

            {

                if (update.Message.Text == "/start")

                {

                    //Здесь можно сохранить ID пользователя, для пошаговых операций

                    await SendMessage(update.Message, "Ваш ID " + update.Message.Chat.Id.ToString());

                }

                else

                {

                    switch (DateTime.Now.Month)

                    {

                        case 6:

                            await SendMessage(update.Message, "Июнь");

                            break;

                        case 7:

                            await SendMessage(update.Message, "Июль");

                            break;

                        case 8:

                            await SendMessage(update.Message, "Август");

                            break;

                        default:

                            await SendMessage(update.Message, "Не летние месяцы");

                            break;

                    }

                }

            }

        }

        public static async Task SendMessage(Message message, string text)

        {

            await _telegramBot.SendTextMessageAsync(message.Chat, text);

        }

​

        public static async Task ErrorHandlerAsync(ITelegramBotClient telegramBot, Exception ex, CancellationToken cancellationToken)

        {

            Console.WriteLine(ex.Message);

        }

    }

}

​