代码如下：
//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();
}