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TreeNodeCollection::SyncRoot Property

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

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public:
virtual property Object^ SyncRoot {
	Object^ get () sealed;
}

Property Value

Type: System::Object
A System::Object that can be used to synchronize access to the TreeNodeCollection.

Implements

ICollection::SyncRoot

The SyncRoot property provides a synchronized version of the TreeNodeCollection that can be used with synchronizing (threading) code.

Caution noteCaution:

The IsSynchronized property of this class always returns false, which indicates that the TreeNodeCollection class is not synchronized (not thread safe).

Synchronizing code must perform operations on the SyncRoot object of the TreeNodeCollection, not directly on the TreeNodeCollection itself. 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 TreeNodeCollection object.

NoteNote:

The object returned in this implementation is the System.Collections::ArrayList object used to store the TreeNode objects in the collection.

Enumerating through a collection is intrinsically not a thread-safe procedure. Even when a collection is synchronized, other threads could still modify the collection, which causes the enumerator to throw an exception. To guarantee thread safety during enumeration, you can either lock the collection during the entire enumeration or catch the exceptions resulting from changes made by other threads.

For more information on the SyncRoot property, see the ICollection::SyncRoot property of the System.Collections::ICollection interface.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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, 2.0
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