telegram-bot/Core/Test.cs

using System.Threading.Tasks;
using BotFramework;
using BotFramework.Attributes;
using BotFramework.Enums;
using Telegram.Bot;

namespace Kruzya.TelegramBot.Core;

public class Test : BotEventHandler
{
    public uint Counter { get; set; } = 5;


    [Command(InChat.All, "test_state")]
    public async Task TestState()
    {
        Counter++;
        await Bot.SendTextMessageAsync(Chat.Id, Counter.ToString());
    }
}