System.Net.NetworkInformation.NetworkChange.AvailabilityChangeListener.ChangedAddress C# (CSharp) Method

            private static void ChangedAddress(object sender, EventArgs eventArgs)
            {
                lock (s_syncObject)
                {
                    bool isAvailableNow = SystemNetworkInterface.InternalGetIsNetworkAvailable();

                    if (isAvailableNow != s_isAvailable)
                    {
                        s_isAvailable = isAvailableNow;

                        var s_copy =
                            new Dictionary<NetworkAvailabilityChangedEventHandler, ExecutionContext>(s_availabilityCallerArray);

                        foreach (var handler in s_copy.Keys)
                        {
                            ExecutionContext context = s_copy[handler];
                            if (context == null)
                            {
                                handler(null, new NetworkAvailabilityEventArgs(s_isAvailable));
                            }
                            else
                            {
                                ExecutionContext.Run(context, s_RunHandlerCallback, handler);
                            }
                        }
                    }
                }
            }