using Echevil;

    NetworkMonitor monitor    =    new NetworkMonitor();
    NetworkAdapter[] adapters    =    monitor.Adapters;

    // adapters 的长度是0，机器上没安装任何网络设备
    if (adapters.Length == 0)
    {
        Console.WriteLine("No network adapters found on this computer.");
        return;
    }

    // 开启一个定时器用以每秒钟计算数据包
    monitor.StartMonitoring();

    for( int i = 0; i < 10; i ++)
    {
        foreach(NetworkAdapter adapter in adapters)
        {
            // Name属性指示网络适配器的名字
            Console.WriteLine(adapter.Name);
            // 下面的参数用以衡量网络上下传的速度：DownloadSpeedKbps，UploadSpeedKbps，UploadSpeed和DownloadSpeed。后面两个是整数值表示每秒的字节数。
            Console.WriteLine(String.Format("dl: {0:n} " + 
               "kbps\t\tul: {1:n} kbps? adapter.DownloadSpeedKbps, 
               adapter.UploadSpeedKbps));
        }
        System.Threading.Thread.Sleep(1000); // Sleeps for one second.
    }

    // 停止定时器，adapter 的属性也不再可用
    monitor.StopMonitoring ();