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TaskFactory.StartNew Method (Action, CancellationToken)

Creates and starts a task.

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

public Task StartNew(
	Action action,
	CancellationToken cancellationToken


Type: System.Action
The action delegate to execute asynchronously.
Type: System.Threading.CancellationToken
The cancellation token that will be assigned to the new task.

Return Value

Type: System.Threading.Tasks.Task
The started task.


The provided CancellationToken has already been disposed.


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.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.