System.Threading.Tasks Namespace

Provides types that simplify the work of writing concurrent and asynchronous code. The main types are Task which represents an asynchronous operation that can be waited on and cancelled, and Task<TResult>, which is a task that can return a value. The TaskFactory class provides static methods for creating and starting tasks, and the TaskScheduler class provides the default thread scheduling infrastructure.

Classes

ConcurrentExclusiveSchedulerPair	Provides task schedulers that coordinate to execute tasks while ensuring that concurrent tasks may run concurrently and exclusive tasks never do.
Parallel	Provides support for parallel loops and regions.
ParallelLoopState	Enables iterations of parallel loops to interact with other iterations. An instance of this class is provided by the Parallel class to each loop; you can not create instances in your code.
ParallelOptions	Stores options that configure the operation of methods on the Parallel class.
Task	Represents an asynchronous operation.
Task<TResult>	Represents an asynchronous operation that can return a value.
TaskAsyncEnumerableExtensions	Provides a set of static methods for configuring Task-related behaviors on asynchronous enumerables and disposables.
TaskCanceledException	Represents an exception used to communicate task cancellation.
TaskCompletionSource	Represents the producer side of a Task unbound to a delegate, providing access to the consumer side through the Task property.
TaskCompletionSource<TResult>	Represents the producer side of a Task<TResult> unbound to a delegate, providing access to the consumer side through the Task property.
TaskExtensions	Provides a set of static methods for Task.
TaskFactory	Provides support for creating and scheduling Task objects.
TaskFactory<TResult>	Provides support for creating and scheduling Task<TResult> objects.
TaskScheduler	Represents an object that handles the low-level work of queuing tasks onto threads.
TaskSchedulerException	Represents an exception used to communicate an invalid operation by a TaskScheduler.
TaskToAsyncResult	Provides methods for using Task to implement the Asynchronous Programming Model pattern based on "Begin" and "End" methods.
UnobservedTaskExceptionEventArgs	Provides data for the event that is raised when a faulted Task's exception goes unobserved.

Structs

ParallelLoopResult	Provides completion status on the execution of a Parallel loop.
ValueTask	Provides an awaitable result of an asynchronous operation.
ValueTask<TResult>	Provides a value type that wraps a Task<TResult> and a TResult, only one of which is used.

Enums

ConfigureAwaitOptions	Options to control behavior when awaiting.
TaskContinuationOptions	Specifies the behavior for a task that is created by using the ContinueWith(Action<Task>, CancellationToken, TaskContinuationOptions, TaskScheduler) or ContinueWith(Action<Task<TResult>>, TaskContinuationOptions) method.
TaskCreationOptions	Specifies flags that control optional behavior for the creation and execution of tasks.
TaskStatus	Represents the current stage in the lifecycle of a Task.

See also

• Parallel Programming in the .NET Framework