The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.
TaskFactory::StartNew Method (Action<Object^>^, Object^, CancellationToken)
.NET Framework (current version)
Creates and starts a Task.
Assembly: mscorlib (in mscorlib.dll)
public:
Task^ StartNew(
Action<Object^>^ action,
Object^ state,
CancellationToken cancellationToken
)
Parameters
- action
-
Type:
System::Action<Object^>^
The action delegate to execute asynchronously.
- state
-
Type:
System::Object^
An object containing data to be used by the action delegate.
- cancellationToken
-
Type:
System.Threading::CancellationToken
The CancellationToken that will be assigned to the new Task
| Exception | Condition |
|---|---|
| ObjectDisposedException | The provided CancellationToken has already been disposed. |
| ArgumentNullException | The exception that is thrown when the action argument is null. |
Calling StartNew is functionally equivalent to creating a Task using one of its constructors and then calling Start to schedule it for execution.
Starting with the .NET Framework 4.5, you can use the Run method with an Action object as a quick way to call StartNew with default parameters. For more information and code examples, see Task.Run vs Task.Factory.StartNew in the Parallel Programming with .NET blog.
Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 5.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 5.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
Show:
Note that the example initializes a single random number generator, which is protected by a lock. For the need of a lock, see "The System.Random class and thread safety" in the Random class topic. To handle the possibility of corruption of the random number generator, a cancellation token is passed to task. If two random numbers equal zero, the method assumes that the random number generator is corrupted and sets the cancellation token. Before sorting the chars array that contains the six characters in a word, the method calls the CancellationToken::ThrowIfCancellationRequested method to throw an OperationCanceledException if the token has been canceled.