System.Net.NetworkInformation.NetworkChange.AddressChangeListener.AddressChangedCallback C# (CSharp) Метод

            private static void AddressChangedCallback(object stateObject, bool signaled)
            {
                lock (s_callerArray)
                {
                    // The listener was canceled, which would only happen if we aren't listening for more events.
                    s_isPending = false;

                    if (!s_isListening)
                    {
                        return;
                    }

                    s_isListening = false;

                    // Need to copy the array so the callback can call start and stop
                    var copy = new Dictionary<NetworkAddressChangedEventHandler, ExecutionContext>(s_callerArray);

                    try
                    {
                        //wait for the next address change
                        StartHelper(null, false, (StartIPOptions)stateObject);
                    }
                    catch (NetworkInformationException nie)
                    {
                        if (NetEventSource.IsEnabled) NetEventSource.Error(null, nie);
                    }

                    foreach (var handler in copy.Keys)
                    {
                        ExecutionContext context = copy[handler];
                        if (context == null)
                        {
                            handler(null, EventArgs.Empty);
                        }
                        else
                        {
                            ExecutionContext.Run(context, s_runHandlerCallback, handler);
                        }
                    }
                }
            }