获取MAC物理地址

using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.NetworkInformation;
using System.Web;

namespace SSK.Puty.Web.Manages.Common
{
public class MACPhysicalIP
{

/// <summary>
/// 获取MAC地址
/// </summary>
/// <returns></returns>
public static string MACPhysicalIPS()
{
string key = "SYSTEM\CurrentControlSet\Control\Network\{4D36E972-E325-11CE-BFC1-08002BE10318}\";
string macAddress = string.Empty;
try
{
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface adapter in nics)
{
if (adapter.NetworkInterfaceType == NetworkInterfaceType.Ethernet
&& adapter.GetPhysicalAddress().ToString().Length != 0)
{
string fRegistryKey = key + adapter.Id + "\Connection";
RegistryKey rk = Registry.LocalMachine.OpenSubKey(fRegistryKey, false);
if (rk != null)
{
string fPnpInstanceID = rk.GetValue("PnpInstanceID", "").ToString();
int fMediaSubType = Convert.ToInt32(rk.GetValue("MediaSubType", 0));
if (fPnpInstanceID.Length > 3 &&
fPnpInstanceID.Substring(0, 3) == "PCI")
{
macAddress = adapter.GetPhysicalAddress().ToString();
for (int i = 1; i < 6; i++)
{
macAddress = macAddress.Insert(3 * i - 1, ":");
}
break;
}
}

}
}
}
catch (Exception ex)
{
//这里写异常的处理
}
return macAddress;
}
}
}