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)

property bool IsSynchronized {
	virtual bool get() sealed = ICollection::IsSynchronized::get;

Property Value

Type: System::Boolean

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

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.

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

// Create a collection derived from NameObjectCollectionBase
ICollection^ myCollection = gcnew DerivedCollection();
bool lockTaken = false;
    Monitor::Enter(myCollection->SyncRoot, lockTaken);
    for each (Object^ item in myCollection)
        // Insert your code here.
    if (lockTaken)

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

Universal Windows Platform
Available since 10
.NET Framework
Available since 2.0
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