Program.cs

using Core;
using Telegram.Bot;
using Telegram.Bot.Types.Enums;
using TelegramBotHelper.Core;

namespace TelegramBotHelper
{
	internal class Program
	{
		static string BotToken = "5991496923:AAFjhww7PhZUX9SKAn3tOQ4UAGfAk8hQOps";

		public static ITelegramBotClient Bot = new TelegramBotClient(BotToken);

		static void Main(string[] args)
		{
			BotBuilder botBuilder = new BotBuilder(Bot);

			botBuilder.AddRoute("/start", UpdateType.Message, (pipeline) =>
			{
				pipeline.Use(async (update) =>
				{
					await Bot.SendTextMessageAsync(update.Message.Chat.Id,"Hello You");
					await Bot.SendTextMessageAsync(update.Message.Chat.Id, "Write Something");
				});
				pipeline.Use(async (update) =>
				{
					await Bot.SendTextMessageAsync(update.Message.Chat.Id, "Hello world");
				});
			});

			botBuilder.Start();
			Console.ReadLine();
		}
	}
}