using System;

using System.Threading;

using System.Threading.Tasks;

​

    public static class Program

    {

        public static void Main(string[] args)

        {

            int value = 0;

​

            var timer = new Timer(async void (object state) =>

            {

                value++;

                await Task.Delay(Random.Shared.Next(90, 110));

                Console.Write(value + " ");

            },

            null,

            TimeSpan.Zero,

            TimeSpan.FromMilliseconds(100));

​

            Console.ReadLine();

        }

    }

​