using System;

using System.Threading;

​

namespace ConsoleApp4

{

    class Program

    {

        static void Main(string[] args)

        {

            ConsoleHelpers.WriteWithRandomDelays("Hello World! Hello World! Hello World! Hello World!");

            Console.ReadLine();

        }

    }

​

    public static class ConsoleHelpers

    {

        public static void WriteWithRandomDelays(string @string, TimeSpan? minDelay = null, TimeSpan? maxDelay = null, Random random = null, Action<int, int> delay = null)

        {

            random ??= new();

            delay ??= (min, max) => Thread.Sleep(random.Next(min, max));

            int min = minDelay.HasValue ? (int)minDelay.Value.TotalMilliseconds : 50;

            int max = maxDelay.HasValue ? (int)maxDelay.Value.TotalMilliseconds : 400;

            foreach (char c in @string)

            {

                Console.Write(c);

                delay(min, max);

            }

        }

    }

}