ArrayList.Synchronized Method (IList)
Returns an IList wrapper that is synchronized (thread safe).
Assembly: mscorlib (in mscorlib.dll)
[HostProtectionAttribute(SecurityAction.LinkDemand, Synchronization = true)] public static IList Synchronized( IList list )
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 HostProtectionAttribute attribute applied to this type or member has the following Resources property value: Synchronization. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.