using System;

using System.Threading.Tasks;

public class Program

{

    public static void Main()

    {

        new TaskTest().Test();

    }

}

​

public class TaskTest

    {

        public int ItemsProcessed { get; private set; }

        public Task DoWorkAsync()

        {

            return Task.Factory.StartNew(() =>

            {

                for (int i = 0; i < 10000; i++)

                {

                    ItemsProcessed++;

                }

            });

        }

​

        public void Test()

        {

            var task1 = this.DoWorkAsync();

            var task2 = this.DoWorkAsync();

            Task.WaitAll(task1, task2);

            Console.WriteLine("items processed: " + ItemsProcessed);

​

        }

    }