Private ReadOnly Property IsSynchronized As Boolean
    Implements ICollection.IsSynchronized

Dim instance As ReadOnlyCollectionBase
Dim value As Boolean

value = CType(instance, ICollection).IsSynchronized

bool ICollection.IsSynchronized { get; }

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

JScript does not support explicit interface implementations.

Implements

A ReadOnlyCollectionBase object is not synchronized. Derived classes can provide a synchronized version of the ReadOnlyCollectionBase class 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.

ReadOnlyCollectionBase myCollection = new ReadOnlyCollectionBase();
  lock(myCollection.SyncRoot) {
  foreach (Object item in myCollection) {
  // Insert your code here.
  }
 }

Dim myCollection As New ReadOnlyCollectionBase()
 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

.NET Framework

Reference