//获得网卡序列号
    public string GetMoAddress()
    {
        string MoAddress = " ";
        ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
        ManagementObjectCollection moc2 = mc.GetInstances();
        foreach (ManagementObject mo in moc2)
        {
            if ((bool)mo["IPEnabled"] == true)
                MoAddress = mo["MacAddress"].ToString();
            mo.Dispose();
        }
        return MoAddress.ToString();
    }