public class MyWindow
{
    ManagementEventWatcher w;

    private void MyWindow_Loaded(object sender, RoutedEventArgs e)
    {
        WqlEventQuery query = new WqlEventQuery("__InstanceCreationEvent", new TimeSpan(0, 0, 1), @"TargetInstance ISA 'Win32_LogicalDisk' and TargetInstance.DriveType = 2");
        ConnectionOptions opt = new ConnectionOptions();
        opt.EnablePrivileges = true;

        ManagementScope ms = new ManagementScope("root\CIMV2", opt);

        w = new ManagementEventWatcher(ms, query);

        w.EventArrived += new EventArrivedEventHandler(w_EventArrived);
        w.Start();
    }

    private void w_EventArrived(object sender, EventArrivedEventArgs e)
    {
        PropertyData pd = e.NewEvent.Properties["TargetInstance"];
    }
}

public void networkDevice()
    {
        try
        {
            WqlEventQuery q = new WqlEventQuery();
            q.EventClassName = "__InstanceModificationEvent";
            q.WithinInterval = new TimeSpan(0, 0, 1);
            q.Condition = @"TargetInstance ISA 'Win32_LogicalDisk' and TargetInstance.DriveType = 5";

            ConnectionOptions opt = new ConnectionOptions();
            opt.EnablePrivileges = true;
            opt.Authority = null;
            opt.Authentication = AuthenticationLevel.Default;
            //opt.Username = "Administrator";
            //opt.Password = "";
            ManagementScope scope = new ManagementScope("\root\CIMV2", opt);

            ManagementEventWatcher watcher = new ManagementEventWatcher(scope, q);
            watcher.EventArrived += new EventArrivedEventHandler(watcher_EventArrived);
            watcher.Start();
        }
        catch (ManagementException e)
        {
            Console.WriteLine(e.Message);
        }
    }

    void watcher_EventArrived(object sender, EventArrivedEventArgs e)
    {
        ManagementBaseObject wmiDevice = (ManagementBaseObject)e.NewEvent["TargetInstance"];
        string driveName = (string)wmiDevice["DeviceID"];
        Console.WriteLine(driveName);
        Console.WriteLine(wmiDevice.Properties["VolumeName"].Value);
        Console.WriteLine((string)wmiDevice["Name"]);
        if (wmiDevice.Properties["VolumeName"].Value != null)
            Console.WriteLine("CD has been inserted");
        else
            Console.WriteLine("CD has been ejected");
    }