Export (0) Print
Expand All

TaskFactory<TResult>.StartNew Method (Func<TResult>, CancellationToken, TaskCreationOptions, TaskScheduler)

Creates and starts a Task<TResult>.

Namespace:  System.Threading.Tasks
Assembly:  mscorlib (in mscorlib.dll)

public Task<TResult> StartNew(
	Func<TResult> function,
	CancellationToken cancellationToken,
	TaskCreationOptions creationOptions,
	TaskScheduler scheduler
)

Parameters

function
Type: System.Func<TResult>
A function delegate that returns the future result to be available through the Task<TResult>.
cancellationToken
Type: System.Threading.CancellationToken
The CancellationToken that will be assigned to the new task.
creationOptions
Type: System.Threading.Tasks.TaskCreationOptions
A TaskCreationOptions value that controls the behavior of the created Task<TResult>.
scheduler
Type: System.Threading.Tasks.TaskScheduler
The TaskScheduler that is used to schedule the created Task<TResult>.

Return Value

Type: System.Threading.Tasks.Task<TResult>
The started Task<TResult>.

ExceptionCondition
ObjectDisposedException

The CancellationTokenSource that created cancellationToken has already been disposed.

ArgumentNullException

The exception that is thrown when the function argument is null.

-or-

The exception that is thrown when the scheduler argument is null.

ArgumentOutOfRangeException

The exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value.

Calling StartNew is functionally equivalent to creating a Task<TResult> using one of its constructors and then calling Start to schedule it for execution.

However, unless creation and scheduling must be separated, StartNew is the recommended approach for both simplicity and performance.

Silverlight

Supported in: 5

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Community Additions

ADD
Show:
© 2014 Microsoft