ArrayList.Synchronized Method (ArrayList)
Returns an ArrayList wrapper that is synchronized (thread safe).
Assembly: mscorlib (in mscorlib.dll)
[<HostProtectionAttribute(SecurityAction.LinkDemand, Synchronization = true)>] static member Synchronized : list:ArrayList -> ArrayList
To guarantee the thread safety of the ArrayList, all operations must be done through this wrapper.
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 during the entire enumeration.
This method is an O(1) operation.
Available since 10
Available since 1.1