Network connection detection

[steve1_rm]

Hello,

VS 2008

I am developing an application that has to detect whether a client has a network connection. i.e. LAN cable plugged in or wireless switched on. I have been using the code below.

I am using the NetworkAvailabilitychangedEvent to fire an event when their wireless is turned off or the cable has been pulled out. However, this only works if the user has only 3 connections present (LAN, Wireless, and loopbacks).
Microsoft:

"The network is available when at least one network interface is marked "up" and is not a tunnel or loopback interface.

However, some client has more than 3 connections. One client had a bluetooth connection and someone else had some VMWare connections. On these client it failed to fire the event.

Is there anyway I can ignore all these connections I am not interested in listening out for, and just listen on the LAN and Wireless?

Many thanks for any advice,

private void Form1_Load(object sender, EventArgs e)
        {
            NetworkChange.NetworkAvailabilityChanged += new NetworkAvailabilityChangedEventHandler(OnNetworkChangedEvent);   
        }

        private void OnNetworkChangedEvent(object sender, NetworkAvailabilityEventArgs e)
        {
            bool available = e.IsAvailable;

            NetworkInterface[] networkConnections = NetworkInterface.GetAllNetworkInterfaces();

            foreach (NetworkInterface ni in networkConnections)
            {
                if (ni.Name == "Local Area Connection")
                {
                    if (ni.OperationalStatus == OperationalStatus.Down)
                    {
                        Console.WriteLine("LAN disconnected: " + ni.Description);
                    }
                }
                else if (ni.Name == "Wireless Network Connection")
                {
                    if (ni.OperationalStatus == OperationalStatus.Down)
                    {
                        Console.WriteLine("Wireless disconnected: " + ni.Description);
                    }
                }
            }
        }

[xander_tan]

Is there anyway I can ignore all these connections I am not interested in listening out for, and just listen on the LAN and Wireless?

private void Form1_Load(object sender, EventArgs e)
        {
            NetworkChange.NetworkAvailabilityChanged += new NetworkAvailabilityChangedEventHandler(OnNetworkChangedEvent);   
        }

        private void OnNetworkChangedEvent(object sender, NetworkAvailabilityEventArgs e)
        {
            bool available = e.IsAvailable;

            NetworkInterface[] networkConnections = NetworkInterface.GetAllNetworkInterfaces();

            foreach (NetworkInterface ni in networkConnections)
            {
                if (ni.Name == "Local Area Connection")
                {
                    if (ni.OperationalStatus == OperationalStatus.Down)
                    {
                        Console.WriteLine("LAN disconnected: " + ni.Description);
                    }
                }
                else if (ni.Name == "Wireless Network Connection")
                {
                    if (ni.OperationalStatus == OperationalStatus.Down)
                    {
                        Console.WriteLine("Wireless disconnected: " + ni.Description);
                    }
                }
            }
        }

I am not really sure what you need. I believe that your code does what you want, to check only the LAN and wireless connection.