ActivityCollection.System.Collections.ICollection.SyncRoot Property

[This is prerelease documentation and is subject to change in future releases. Blank topics are included as placeholders.]

Gets an object that can be used to synchronize access to the ICollection.


Namespace: System.Workflow.ComponentModel
Assembly: System.Workflow.ComponentModel (in system.workflow.componentmodel.dll)

Property Value

An object that can be used to synchronize access to the ICollection.

For collections whose underlying store is not publicly available, the expected implementation is to return the current instance. Note that the pointer to the current instance might not be sufficient for collections that wrap other collections; those should return the underlying collection SyncRoot property.

Most collection classes in the System.Collections namespace also implement a Synchronized method, which provides a synchronized wrapper around the underlying collection. However, derived classes can provide their own synchronized version of the collection using the System.Collections.ICollection.SyncRoot property. The synchronizing code must perform operations on the System.Collections.ICollection.SyncRoot property of the collection, not directly on the collection. This ensures proper operation of collections that are derived from other objects. Specifically, it maintains proper synchronization with other threads that might be simultaneously modifying the collection instance.


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

Development Platforms

Windows XP Home Edition, Windows XP Professional, Windows Server 2003 , Windows Server 2008, and Windows 2000

Target Platforms

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