using System;

using System.Threading.Tasks;

using System.Threading;

​

public class Program

{

    public static void Main()

    {

    object lock1 = new object();

    object lock2 = new object();

    Console.WriteLine("Starting...");

​

    var task1 = Task.Run(() =>

    {

        lock (lock1)

        {

            Thread.Sleep(1000);

            lock (lock2)

            {

                Console.WriteLine("Finished Thread 1");

            }

        }

    });

    var task2 = Task.Run(() =>

    {

        lock (lock1)

        {

            Thread.Sleep(1000);

            lock (lock2)

            {

                Console.WriteLine("Finished Thread 2");

            }

        }

    });

    Task.WaitAll(task1, task2);

    Console.WriteLine("Finished...");

    }

}