获取本地MAC地址

using System.Management;
       private void button1_Click(object sender, EventArgs e)
        {
            ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT   *   FROM   Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection queryCollection = query.Get();
            foreach (ManagementObject mo in queryCollection)
            {
                if (mo["IPEnabled"].ToString() == "True")
                    MessageBox.Show(mo["MacAddress"].ToString());
            }
        }