C#网络工具类NetTools，获取IP/MAC地址

using System;
using System.Collections.Generic;
using System.Net;
using System.Net.NetworkInformation;
using System.Runtime.InteropServices;
using System.Text;
using System.Text.RegularExpressions;

namespace CSFrameworkV5.Common
{

    /// <summary>
    /// C#网络工具类，获取IP/MAC地址
    /// </summary>
    public class NetTools
    {
        [DllImport("Iphlpapi.dll")]
        private static extern int SendARP(Int32 dest, Int32 host, ref Int32 mac, ref Int32 length);

        [DllImport("Ws2_32.dll")]
        private static extern Int32 inet_addr(string ip);

        /// <summary>
        /// 获取本机IP
        /// </summary>
        /// <returns></returns>
        public static string GetLocalIP()
        {
            IPHostEntry ipe = Dns.GetHostEntry(Dns.GetHostName());
            foreach (IPAddress IP in ipe.AddressList)
            {
                if (IP.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
                    return IP.ToStringEx();
            }
            return "";
        }

        /// <summary>
        /// 获取第一个MAC地址
        /// </summary>
        /// <returns></returns>
        public static string GetLocalMac()
        {
            List<string> macs = GetMacByNetworkInterface();
            if (macs.Count > 0)
                return macs[0];
            else
                return "";
        }

        ///<summary>
        /// 通过NetworkInterface读取网卡Mac
        ///</summary>
        ///<returns></returns>
        public static List<string> GetMacByNetworkInterface()
        {
            List<string> macs = new List<string>();
            NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();
            foreach (NetworkInterface ni in interfaces)
            {
                macs.Add(ni.GetPhysicalAddress().ToStringEx());
            }
            return macs;
        }

        /// <summary>
        /// 根据本地IP地址获取MAC地址（Windows API函数方式）
        /// </summary>
        /// <param name="IP"></param>
        /// <returns></returns>
        public static string GetMACFromIP(string IP)
        {
            string strRet = "Unknown";

            string strIPPattern = @"^\d+\.\d+\.\d+\.\d+$";

            Regex objRex = new Regex(strIPPattern);

            if (objRex.IsMatch(IP) == true)
            {
                Int32 intDest = inet_addr(IP);
                Int32[] arrMAC = new Int32[2];
                Int32 intLen = 6;

                int intResult = SendARP(intDest, 0, ref arrMAC[0], ref intLen);

                if (intResult == 0)
                {
                    Byte[] arrbyte = new Byte[8];
                    arrbyte[5] = (Byte)(arrMAC[1] >> 8);
                    arrbyte[4] = (Byte)arrMAC[1];
                    arrbyte[3] = (Byte)(arrMAC[0] >> 24);
                    arrbyte[2] = (Byte)(arrMAC[0] >> 16);
                    arrbyte[1] = (Byte)(arrMAC[0] >> 8);
                    arrbyte[0] = (Byte)arrMAC[0];

                    StringBuilder strbMAC = new StringBuilder();

                    for (int intIndex = 0; intIndex < 6; intIndex++)
                    {
                        if (intIndex > 0) strbMAC.Append("-");
                        strbMAC.Append(arrbyte[intIndex].ToString("X2"));
                    }
                    strRet = strbMAC.ToString();
                }
            }

            return strRet;
        }


    }
}

  //获取第一个MAC地址:00FF84460462
                var macd0 = NetTools.GetLocalMac();

                //根据本地IP地址获取MAC地址：00-E0-4C-44-17-F4
                var macd1 = NetTools.GetMACFromIP("192.168.0.172");

                //获取本机IP
                var ip = NetTools.GetLocalIP();
                //根据本地IP地址获取MAC地址：00-E0-4C-44-17-F4
                var macd2 = NetTools.GetMACFromIP(ip);