Task Factories

A task factory is represented by the System.Threading.Tasks.TaskFactory class, which creates Task objects, or the System.Threading.Tasks.TaskFactory<TResult> class, which creates Task<TResult> objects. Both classes contain methods that you can use to:

The Task class has a static property that represents the default TaskFactory. Typically, TaskFactory methods are invoked by using the Factory property, as shown in the following example.

[Visual Basic]

Dim taskA as Task = Task.Factory.StartNew(Sub( ...))

[C#]

Task taskA = Task.Factory.StartNew( () => ...);

In most scenarios, you do not have to derive a new class from TaskFactory. However, it is sometimes useful to configure a new TaskFactory and then use it to specify certain options or to associate tasks with a custom scheduler. The following example shows how to configure a new TaskFactory that creates tasks that all use the specified TaskScheduler and have the specified TaskCreationOptions options.


class Program
{
    static CancellationTokenSource cts = new CancellationTokenSource();
    private static TaskFactory _factory = new TaskFactory(
                                        cts.Token,
                                        TaskCreationOptions.PreferFairness,
                                        TaskContinuationOptions.ExecuteSynchronously,
                                        new MyScheduler());

    static void Main(string[] args)
    {
        var t2 = _factory.StartNew(() => DoWork());            
    }

    static void DoWork() {/*...*/ }
}


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