using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

​

public class Program

{

    public static void Main(string[] args)

    {

        List<int> list = new List<int>();

        list.AddRange(new int[] {10, 200, 300, 400, 234 });

        // create a bunch of threads

        List<Thread> threads = new List<Thread>();

        list.ForEach(x => threads.Add(new Thread(() => ThreadMethod(x))));

        // start them

        threads.ForEach(x => x.Start());

        // wait for them to finish

        threads.ForEach(x => x.Join());

        // this will not print untill all threads have completed

        Console.WriteLine("Done");

    }

​

    private static void ThreadMethod(int i)

    {

        Thread.Sleep(i);

        Console.WriteLine("Thread: " + i);

    }

}