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NameObjectCollectionBase.ICollection.IsSynchronized Property

Gets a value indicating whether access to the NameObjectCollectionBase object is synchronized (thread safe).

Namespace:  System.Collections.Specialized
Assembly:  System (in System.dll)

'Declaration
Private ReadOnly Property IsSynchronized As Boolean 
	Implements ICollection.IsSynchronized
'Usage
Dim instance As NameObjectCollectionBase 
Dim value As Boolean 

value = CType(instance, ICollection).IsSynchronized

Property Value

Type: System.Boolean
true if access to the NameObjectCollectionBase object is synchronized (thread safe); otherwise, false. The default is false.

Implements

ICollection.IsSynchronized

A NameObjectCollectionBase object is not synchronized. Derived classes can provide a synchronized version of the NameObjectCollectionBase using the SyncRoot property.

Enumerating through a collection is intrinsically not a thread-safe procedure. Even when a collection is synchronized, other threads can 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.

[Visual Basic, C#]

The following code example shows how to lock the collection using the SyncRoot property during the entire enumeration.

Dim myCollection As New NameObjectCollectionBase()
 Dim item As Object
 SyncLock myCollection.SyncRoot
  For Each item In myCollection
  ' Insert your code here.
  Next item
 End SyncLock

Retrieving the value of this property is an O(1) operation.

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, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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