1 　　　　　/// <summary> 
 2         /// 获取网卡物理地址 
 3         /// </summary> 
 4         /// <returns></returns> 
 5         public static string getMAC()
 6         {
 7             string madAddr = null;
 8             ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
 9             ManagementObjectCollection moc2 = mc.GetInstances();
10             foreach (ManagementObject mo in moc2)
11             {
12                 if (Convert.ToBoolean(mo["IPEnabled"]) == true)
13                 {
14                     madAddr = mo["MacAddress"].ToString();
15                     madAddr = madAddr.Replace(':', '-');
16                 }
17                 mo.Dispose();
18             }
19             return madAddr;
20         }