using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

​

namespace TaskHF

{

    class Program

    {

        static Random rnd = new Random();

​

        static void Main(string[] args)

        {

            int charCount = rnd.Next(10, 21);

            Task[] tasks = new Task[charCount];

​

            for (int i = 0; i < tasks.Length; i++)

            {

                tasks[i] = Task.Factory.StartNew(() => Draw((char)rnd.Next(0, 128)));

            }

​

            Console.ReadLine();

        }

​

        private static void Draw(char c)

        {

            Console.SetCursorPosition(rnd.Next(0, Console.WindowWidth), rnd.Next(0, Console.WindowHeight));

            Console.Write(c);

            Thread.Sleep(rnd.Next(500, 1000));

        }

    }

}

​