NetworkChange Class

using System;
using System.Net;
using System.Net.NetworkInformation;

namespace Examples.Net.AddressChanges
{
    public class NetworkingExample
    {
        public static void Main()
        {
            NetworkChange.NetworkAddressChanged += new 
            NetworkAddressChangedEventHandler(AddressChangedCallback);
            Console.WriteLine("Listening for address changes. Press any key to exit.");
            Console.ReadLine();
        }
        static void AddressChangedCallback(object sender, EventArgs e)
        {

            NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
            foreach(NetworkInterface n in adapters)
            {
                Console.WriteLine("   {0} is {1}", n.Name, n.OperationalStatus);
            }
        }
    }
}

#using <mscorlib.dll>
#using <System.dll>
using namespace System;
using namespace System::Net;
using namespace System::Net::NetworkInformation;

void AddressChangedCallback(Object* /*sender*/, EventArgs* /*e*/)
{

    NetworkInterface* adapters[] = NetworkInterface::GetAllNetworkInterfaces();
    System::Collections::IEnumerator* myEnum = adapters->GetEnumerator();
    while (myEnum->MoveNext())
    {
        NetworkInterface* n = __try_cast<NetworkInterface*>(myEnum->Current);
        Console::WriteLine(S"   {0} is {1}", n->Name, __box(n->OperationalStatus));
    }
}

int main()
{
    NetworkChange::NetworkAddressChanged += new 
        NetworkAddressChangedEventHandler(AddressChangedCallback);
    Console::WriteLine(S"Listening for address changes. Press any key to exit.");
    Console::ReadLine();
}