C#修改网卡MAC地址的源码，可以随机生成地址

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

using System.Security.Permissions;
using System.Management;
using Microsoft.Win32;
using System.Net.NetworkInformation;
using System.Text.Regularexpressions;


namespace MACAddressTool
{
    public partial class Form1 : Form
    {
        public class Adapter
        {
            public Managementobject adapter;
            public string adaptername;
            public string customname;
            public int devnum;

            public Adapter（Managementobject a string aname string cname int n）
            {
                this.adapter = a;
                this.adaptername = aname;
                this.customname = cname;
                this.devnum = n;
            }

            public Adapter（NetworkInterface i） : this（i.Description） { }

            public Adapter（string aname）
            {
                this.adaptername = aname;

                var searcher = new ManagementobjectSearcher（“select * from win32_networkadapter where Name=‘“ + adaptername + “‘“）;
                var found = searcher.Get（）;
                this.adapter = found.Castject>（）.FirstOrDefault（）;

                // Extract adapter number; this should correspond to the keys under
                // HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e972-e325-11ce-bfc1-08002be10318}
                try
                {
                    var match = Regex.Match（adapter.Path.RelativePath “\\\“（\\d+）\\\“$“）;
                    this.devnum = int.Parse（match.Groups[1].Value）;
                }
                catch
                {
                    return;
                }

                // Find the name the user gave to it in “Network Adapters“
                this.customname = NetworkInterface.GetAllNetworkInterfaces（）.Where（
                    i => i.Description == adaptername
                ）.Select（
                    i => “ （“ + i.Name + “）“
                ）.FirstOrDefault（）;
            }

            public NetworkInterface ManagedAdapter
            {
                get
                {
                    return NetworkInterface.GetAllNetworkInterfaces（）.Where（
                        nic => nic.Description == this.adaptername
                    ）.FirstOrDefault（）;
                }
            }

            public string Mac
            {
                get
                {
                    try
                    {
                        return BitConverter.ToString（this.ManagedAdapter.GetPhysicalAddress（）.GetAddressBytes（））.Replace（“-“ ““）.ToUpper（）;
                    }
                    catch { return null; }
                }
            }

            public string RegistryKey
            {
                get
                {
                    return String.Format（@“SYSTEM\ControlSet0