IP Address Change Notification

Recently I worked on a project, where I had to do some processing (reconnecting logic) whenever the IP address of the machine is changed. First, I felt that its going to be decently complex. But after a bit of R & D work, I came to know that it is surprisingly easy to do this with .NET! (such is the power of .NET Framework classes).

All I had to do was to register an event listener for the NetworkAddressChanged event (System.Net namespace). I did it on the application startup.

NetworkChange.NetworkAddressChanged += new System.Net.NetworkInformation.NetworkAddressChangedEventHandler(this.AddressChangedCallback);

Whenever the IP address of the machine is changed, the AddressChangedCallback() will be called. And thats it!

private void AddressChangedCallback(object sender, EventArgs e)
{
    NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
    foreach (NetworkInterface n in adapters)
    {
        System.Diagnostics.Trace.WriteLine(n.Name + " is " + n.OperationalStatus); 
    }
}