using System;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    public static void Main()

    {

        var task1 = new Task(() => { Thread.Sleep(1000); Console.WriteLine("Task 1"); });

        task1.Start();

        while (task1.Status != TaskStatus.RanToCompletion) {}

​

        var task2 = task1.ContinueWith(prevTask => { Console.WriteLine("Task 2"); });

        while (task2.Status != TaskStatus.RanToCompletion) {}

        Console.WriteLine("Finished");

    }

}