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DelayActivity Class

Provides the logic to establish a timer and to wait, asynchronously, for timer's expiration. This class cannot be inherited.

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

[ToolboxBitmapAttribute(typeof(DelayActivity), "Resources.Delay.png")]
public sealed class DelayActivity : Activity, 
	IEventActivity, IActivityEventListener<QueueEventArgs>

When notified that its timer has expired, a DelayActivity completes its execution.

You can set a time out on the DelayActivity so that your workflow pauses before resuming execution. You specify the TimeoutDuration using TimeSpan. This causes your workflow to pause until the specified TimeSpan has elapsed.

The DelayActivity class runs the code method associated with the InitializeTimeoutDuration event before the activity starts and the code-beside method can be used to initialize the TimeoutDuration property.

The DelayActivity is guaranteed to complete no sooner than the indicated TimeoutDuration. The delay can take longer because the timer notification might occur some time after the TimeoutDuration is reached. One reason for a longer delay is if the workflow is running under high system stress in a server environment.

The following code example demonstrates how to create a new instance of the DelayActivity class. This code example is part of the SimpleStateMachineWorkflow SDK Sample from the StateMachineWorkflow.cs file. For more information, see Simple State Machine.

this.StartState = new System.Workflow.Activities.StateActivity();

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

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

.NET Framework

Supported in: 3.5, 3.0

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