using System;

using System;

using System.IO;

using System.Collections.Generic;

using System.Diagnostics;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

public class Example

{

   public static void Main()

   { Stopwatch stopwatch = new Stopwatch();

​

            stopwatch.Start();

      tasks();

    TimeSpan ts = stopwatch.Elapsed;

​

            Console.WriteLine("Execution Time is {0:00}:{1:00}:{2:00}.{3}",

                            ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds);

   }

    public static void tasks(){

     Task[] tasks = new Task[2];

      String[] files = null;

      String[] dirs = null;

      String docsDirectory = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);

​

      tasks[0] = Task.Factory.StartNew( () => files = Directory.GetFiles(docsDirectory));

      tasks[1] = Task.Factory.StartNew( () => dirs = Directory.GetDirectories(docsDirectory));

​

      Task.Factory.ContinueWhenAll(tasks, completedTasks => {

                                             Console.WriteLine("{0} contains: ", docsDirectory);

                                             Console.WriteLine("   {0} subdirectories", dirs.Length);

                                             Console.WriteLine("   {0} files", files.Length);

                                          } );

        Task.WaitAll(tasks);

​

    }

}