TaskFactory.StartNew Method (Action, CancellationToken, TaskCreationOptions, TaskScheduler)
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Creates and starts a Task.
Namespace: System.Threading.Tasks
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Function StartNew ( _
action As Action, _
cancellationToken As CancellationToken, _
creationOptions As TaskCreationOptions, _
scheduler As TaskScheduler _
) As Task
public Task StartNew(
Action action,
CancellationToken cancellationToken,
TaskCreationOptions creationOptions,
TaskScheduler scheduler
)
Parameters
- action
Type: System.Action
The action delegate to execute asynchronously.
- 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
- scheduler
Type: System.Threading.Tasks.TaskScheduler
The TaskScheduler that is used to schedule the created Task.
Return Value
Type: System.Threading.Tasks.Task
The started Task.
Exceptions
| Exception | Condition |
|---|---|
| ObjectDisposedException | The provided CancellationToken has already been disposed. |
| ArgumentNullException | The exception that is thrown when the action 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. The exception that is thrown when the creationOptions argument specifies an invalid TaskCreationOptions value. For more information, see the Remarks for FromAsync |
Remarks
Calling StartNew is functionally equivalent to creating a Task 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.
Version Information
Silverlight
Supported in: 5
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.
See Also