using Telebot;

var tg = new Telegram("<YOUR_BOT_TOKEN>");

// Get bot info
var me = await tg.GetMeAsync(new GetMeRequestParams());
Console.WriteLine(me);

// Long polling
var updates = await tg.GetUpdatesAsync(
    new GetUpdatesRequestParams(Timeout: 10)
);

foreach (var update in updates)
{
    if (update.Message?.Text is not null)
    {
        Console.WriteLine("Echoing: " + update.Message.Text);

        await tg.SendMessageAync(
            new SendMessageRequestParams(
                update.Message.Chat.Id,
                update.Message.Text
            )
        );
    }
}