List(Of T).ICollection.SyncRoot Property
Gets an object that can be used to synchronize access to the ICollection.
Assembly: mscorlib (in mscorlib.dll)
'Declaration Private ReadOnly Property SyncRoot As Object Implements ICollection.SyncRoot 'Usage Dim instance As List Dim value As Object value = CType(instance, ICollection).SyncRoot
Property ValueType: System.Object
An object that can be used to synchronize access to the ICollection. In the default implementation of List(Of T), this property always returns the current instance.
Default implementations of collections in the System.Collections.Generic namespace are not synchronized.
Enumerating through a collection is intrinsically not a thread-safe procedure. To guarantee thread safety during enumeration, you can lock the collection during the entire enumeration. To allow the collection to be accessed by multiple threads for reading and writing, you must implement your own synchronization.
SyncRoot returns an object that can be used to synchronize access to the ICollection. Synchronization is effective only if all threads lock this object before accessing the collection. The following code shows the use of the SyncRoot property for C#, C++, and Visual Basic.
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.