检测网卡的禁用、启用

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Management;

namespace Record
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ManagementClass newClass = new ManagementClass();

            //Set up an event watcher and a handler for the event
            ManagementEventWatcher networkAdapterArrivalWatcher =
            new ManagementEventWatcher("http://www.cnblogs.com/94cool/admin/file://root//wmi",
            "SELECT * FROM MSNdis_NotifyAdapterArrival ");

            ManagementEventWatcher networkAdapterRemovalWatcher =
            new ManagementEventWatcher("http://www.cnblogs.com/94cool/admin/file://root//wmi",
            "SELECT * FROM MSNdis_NotifyAdapterRemoval ");

            MyHandler handler = new MyHandler();
            networkAdapterArrivalWatcher.EventArrived += new EventArrivedEventHandler(handler.Arrived);
            networkAdapterRemovalWatcher.EventArrived += new EventArrivedEventHandler(handler.Removed);
            //Start watching for events
            networkAdapterArrivalWatcher.Start();
            networkAdapterRemovalWatcher.Start();
            //while (true)
            //    System.Threading.Thread.Sleep(200000);
            //IsNetworkAvailable;
        }
    }
    public class MyHandler
    {
        public void Arrived(object sender, EventArrivedEventArgs e)
        {
            Console.WriteLine("Network connected");
        }

        public void Removed(object sender, EventArrivedEventArgs e)
        {
            Console.WriteLine("Network disconnected");
        }
    }
}