ListDictionary.IsSynchronized Property
Definition
Important
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Gets a value indicating whether the ListDictionary is synchronized (thread safe).
public:
property bool IsSynchronized { bool get(); };public bool IsSynchronized { get; }member this.IsSynchronized : boolPublic ReadOnly Property IsSynchronized As BooleanProperty Value
This property always returns false.
Implements
Examples
The following code example shows how to lock the collection using the SyncRoot during the entire enumeration.
ListDictionary^ myCollection = gcnew ListDictionary();
bool lockTaken = false;
try
{
Monitor::Enter(myCollection->SyncRoot, lockTaken);
for each (Object^ item in myCollection)
{
// Insert your code here.
}
}
finally
{
if (lockTaken)
{
Monitor::Exit(myCollection->SyncRoot);
}
}
ListDictionary myCollection = new ListDictionary();
lock(myCollection.SyncRoot)
{
foreach (object item in myCollection)
{
// Insert your code here.
}
}
Dim myCollection As New ListDictionary()
SyncLock myCollection.SyncRoot
For Each item as Object In myCollection
' Insert your code here.
Next item
End SyncLock
Retrieving the value of this property is an O(1) operation.
Remarks
ListDictionary implements the IsSynchronized property because it is required by the System.Collections.ICollection interface.
Derived classes can provide a synchronized version of the ListDictionary 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.
