CancellationToken.Register Method (Action)
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Registers a delegate that will be called when this CancellationToken is canceled.
Namespace: System.Threading
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Function Register ( _
callback As Action _
) As CancellationTokenRegistration
public CancellationTokenRegistration Register(
Action callback
)
Parameters
- callback
Type: System.Action
The delegate to be executed when the CancellationToken is canceled.
Return Value
Type: System.Threading.CancellationTokenRegistration
The CancellationTokenRegistration instance that can be used to deregister the callback.
Exceptions
| Exception | Condition |
|---|---|
| ObjectDisposedException | The associated CancellationTokenSource has been disposed. |
| ArgumentNullException | callback is null. |
Remarks
If this token is already in the canceled state, the delegate will be run immediately and synchronously. Any exception the delegate generates will be propagated out of this method call.
The current ExecutionContext, if one exists, will be captured along with the delegate and will be used when executing it.
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.