using System;

using System.Threading;

using System.Threading.Tasks;

​

namespace LISTING_1_13_Task_Factory

​

// This is a bonus example program that shows how to use the TaskFactory object

// Normally you'd use Task.Factory.StartNew or the thread pool in preference

// Task.Factory.StartNew is used in Listing 1-17 and the thread pool is described in Listing 1-28

​

// The example creates a task factory and uses it to create a task that runs until it completes.

// If you press enter before five seconds have elapsed the task is terminated and the program ends. 

​

{

    public class Program

    {

        public static void Main(string[] args)

        {

            // Used to allow us to control the an executing task

            CancellationTokenSource cts = new CancellationTokenSource();

​

            // Create the task factory

​

            TaskFactory factory = new TaskFactory(

               cts.Token,

               TaskCreationOptions.PreferFairness,

               TaskContinuationOptions.ExecuteSynchronously,

               null); // custom scheduler could go here. 

​

            // Use the factory to create a new Task running do work

            Task t2 = factory.StartNew(() => DoWork());

​

            Console.WriteLine("Press enter to dispose of the task");

            Console.ReadLine();

​

            Console.WriteLine("Disposing of the task");

​

            // Cancel the task

            // dispose of the task using the cancellation token

            cts.Dispose();

​

        }

​

        static void DoWork()

        {

            Console.WriteLine("Doing work..");

​

            int total = 0;

​

            for (int i = 0; i < 5000; i++)

            {

                Thread.Sleep(1);

                total += i;

            }

​

            Console.WriteLine("Result: " + total);

        }

    }

}