C# 获取 MAC地址！

最近项目中需要一个方法，来获取本机的ＭＡＣ地址。
本人最后找到两种方法来实现此功能：

　　　方法一：直接获取

using System;
using System.Management;

namespace PublicBill.GetMAC
{
    class GetMAC
    {
        [STAThread]
        static void Main(string[] args)
        {
            string mac = "";
            ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection moc = mc.GetInstances();
            foreach(ManagementObject mo in moc)
            {
                if(mo["IPEnabled"].ToString() == "True")
                {
                    mac = mo["MacAddress"].ToString();
                }
            }
            Console.WriteLine("MAC Address: " + mac.ToString());
        }
    }
}

　　　方法二：ＡＲＰ协议的解析原理获取ＭＡＣ地址

using System; 
using System.Runtime.InteropServices; 
using System.Net;

namespace GetMacAddress
{
    class MAC
    {
        [DllImport("Iphlpapi.dll")] 
        private static extern int SendARP(Int32 dest,Int32 host,ref ulong mac,ref IntPtr length); 
        [DllImport("Ws2_32.dll")] 
        private static extern Int32 inet_addr(string ip); 

        [STAThread]
        static void Main(string[] args)
        {
            IPHostEntry hostInfo = Dns.GetHostByName(Dns.GetHostName());
            IPAddress[] addrs = hostInfo.AddressList;
            IPAddress ipAddress = addrs[0];

            Int32 ldest=inet_addr(ipAddress.ToString());

            try
            {
                Int32 length = 6;
                ulong mac = 0;
                IntPtr len = new IntPtr(length);
                int ii=SendARP(ldest,0,ref mac,ref len);
                string l = "";
                string h = "";
                int n = 1;
                long m = 0;
                long lm = (long)mac;
                while(lm>0)
                {
                    m = lm%16;
                    lm = lm/16;
                    if(m>9)
                    {
                        if(m==10)l="A"+l; 
                        if(m==11)l="B"+l; 
                        if(m==12)l="C"+l; 
                        if(m==13)l="D"+l; 
                        if(m==14)l="E"+l; 
                        if(m==15)l="F"+l; 
                    }
                    else
                    {
                        l = m.ToString() + 1;
                    }
                    if((n%2)==0)
                    {
                        h = h + 1;
                        l = "";
                    }
                    ++n;
                }
                Console.WriteLine(" IP Address: " + ipAddress.ToString());
                Console.WriteLine("MAC Address: " + h);
            }
            catch(Exception error)
            {
                Console.WriteLine(error);
            }
        }
    }
}