using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

public class Program

{

    TimeSpan startTimeSpan;

    TimeSpan periodTimeSpan;

    System.Threading.Timer timer;

    public static void Main()

    {

        Program program = new Program();

        program.StartTimer(100, 20);

    }

​

    protected void PostTestMenu()

    {

        int choice;

        Console.WriteLine(" ");

        Console.WriteLine(" ");

        Console.WriteLine(" ");

        Console.WriteLine("############### Was nun ##############");

        Console.WriteLine("Test wiederholen                     1");

        Console.WriteLine("Hauptmenü                            2");

        choice = Console.Read();

        switch (choice)

        {

            case 1:

                Console.WriteLine("1");

                break;

            case 2:

                Console.WriteLine("2");

                break;

            default:

                Console.WriteLine("Wrong Choice:");

                break;

        }

​

        Console.Read();

    }

​

    protected void StartTimer(int milliseconds, long iterations)

    {

        startTimeSpan = TimeSpan.Zero;

        periodTimeSpan = TimeSpan.FromMilliseconds(milliseconds);

        timer = new System.Threading.Timer((e) =>

        {

            if (iterations-- == 0)

            {

                timer.Dispose();

                Console.WriteLine("Finished");

                PostTestMenu();

            }

        }

​

        , null, startTimeSpan, periodTimeSpan);

        Console.ReadLine();

    }

}