ICollection.IsSynchronized Property
.NET Framework Class Library
Dictionary<(Of <(TKey, TValue>)>)..::.ICollection..::.IsSynchronized Property

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

Namespace:  System.Collections.Generic
Assembly:  mscorlib (in mscorlib.dll)
Visual Basic (Declaration)
Private ReadOnly Property IsSynchronized As Boolean
    Implements ICollection.IsSynchronized
Visual Basic (Usage)
Dim instance As Dictionary
Dim value As Boolean

value = CType(instance, ICollection).IsSynchronized
C#
bool ICollection.IsSynchronized { get; }
Visual C++
private:
virtual property bool IsSynchronized {
    bool get () sealed = ICollection::IsSynchronized::get;
}
JScript
JScript does not support explicit interface implementations.

Property Value

Type: System..::.Boolean
true if access to the ICollection is synchronized (thread safe); otherwise, false. In the default implementation of Dictionary<(Of <(TKey, TValue>)>), this property always returns false.

Implements

ICollection..::.IsSynchronized

Default implementations of collections in the System.Collections.Generic namespace are not synchronized.

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 can cause 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.

The SyncRoot property returns an object that can be used to synchronize access to the ICollection. Synchronization is effective only if all threads lock the object before accessing the collection.

Getting 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

XNA Framework

Supported in: 3.0, 2.0, 1.0
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