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ActivityExecutionContext.CancelActivity Method

Called by a composite activity to schedule the cancellation of a child activity. The workflow runtime disallows cancellation of a child activity that is not in the Executing state.

Namespace:  System.Workflow.ComponentModel
Assembly:  System.Workflow.ComponentModel (in System.Workflow.ComponentModel.dll)

public void CancelActivity(
	Activity activity


Type: System.Workflow.ComponentModel.Activity

The canceled Activity.


activity is null.


activity is not a valid child of the ActivityExecutionContext. This means that either the argument is equal to the associated Activity or that the argument is not in the commented state and is a child of the Activity associated with this ActivityExecutionContext.


The ActivityExecutionContext has been disposed.


activity is not in the Executing state.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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