C#获取CPUID(MD5输出),网卡ID，主DNS，备用DNS

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Management;
using System.Security.Cryptography;
using System.Net;
using System.Net.NetworkInformation;
using System.Text.RegularExpressions;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{

public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{

}
string txtIP="";
string txtSubMark="";
string txtGateWay="";
private void Form1_Load(object sender, EventArgs e)
{
//cpuid
string str = string.Empty;
ManagementClass mcCpu = new ManagementClass("win32_Processor");
ManagementObjectCollection mocCpu = mcCpu.GetInstances();
foreach (ManagementObject m in mocCpu)
{
str = m["Processorid"].ToString().Trim().Substring(0, 8);//BFEBFBFF00000F65
}
//MD5加密
byte[] result = Encoding.Default.GetBytes(str);
MD5 md5 = new MD5CryptoServiceProvider();
byte[] output = md5.ComputeHash(result);
this.textBox1.Text = BitConverter.ToString(output).Replace("-", "");

//获取网卡ID
ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");

ManagementObjectCollection moc2 = mc.GetInstances();

ManagementBaseObject inPar = null;
foreach (ManagementObject mo in moc2)
{

if ((bool)mo["IPEnabled"] == true)

textBox2.Text = mo["MacAddress"].ToString();
mo.Dispose();

}

//获取首选dns
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface adapter in nics)
{
bool Pd1 = (adapter.NetworkInterfaceType == NetworkInterfaceType.Ethernet); //判断是否是以太网连接
if (Pd1)
{
IPInterfaceProperties ip = adapter.GetIPProperties(); //IP配置信息
if (ip.UnicastAddresses.Count > 0)
{
txtIP = ip.UnicastAddresses[0].Address.ToString();//IP地址
txtSubMark = ip.UnicastAddresses[0].IPv4Mask.ToString();//子网掩码

}
if (ip.GatewayAddresses.Count > 0)
{
txtGateWay = ip.GatewayAddresses[0].Address.ToString();//默认网关
}
int DnsCount = ip.DnsAddresses.Count;
textBox3.Text = ip.DnsAddresses[0].ToString();
textBox4.Text = ip.DnsAddresses[1].ToString();
}
}
}
}
}