1 private void GetIP()  
 2 {  
 3     string hostName = Dns.GetHostName();//本机名   
 4     //System.Net.IPAddress[] addressList = Dns.GetHostByName(hostName).AddressList;//会警告GetHostByName()已过期，我运行时且只返回了一个IPv4的地址    
 5     System.Net.IPAddress[] addressList = Dns.GetHostAddresses(hostName);//会返回所有地址，包括IPv4和IPv6    
 6     foreach (IPAddress ip in addressList)  
 7     {  
 8         listBox1.Items.Add(ip.ToString());  
 9     }  
10 }

1         static string GetLocalIp()  
2         {  
3             string hostname = Dns.GetHostName();//得到本机名   
4             //IPHostEntry localhost = Dns.GetHostByName(hostname);//方法已过期，只得到IPv4的地址   
5 <SPAN style="WHITE-SPACE: pre"> </SPAN>    IPHostEntry localhost = Dns.GetHostEntry(hostname);  
6             IPAddress localaddr = localhost.AddressList[0];  
7             return localaddr.ToString();  
8         }

 1        string strUrl = "提供IP查询的网站的链接";  
 2        Uri uri = new Uri(strUrl);  
 3        WebRequest webreq = WebRequest.Create(uri);  
 4        Stream s = webreq .GetResponse().GetResponseStream();  
 5        StreamReader sr = new StreamReader(s, Encoding.Default);  
 6        string all = sr.ReadToEnd();   
 7        int i = all.IndexOf("[") + 1;  
 8        //分析字符串得到IP    9        return ip;  
10        /* 11         我用的是http://www.php.cn/    
12         (这种链接很容易找的，百度“IP”得到一些网站，分析一下网站的链接就能得到) 
13         返回的数据是：  
14         <p class="well"><p>当前 IP：<code>0.0.0.0</code>&nbsp;来自：XX省XX市 电信</p><p>GeoIP: Beijing, China</p></p>  
15         解析这段就行  
16       */

 1 private void GetIP2()  
 2         {  
 3             string stringMAC = "";  
 4             string stringIP = "";  
 5             ManagementClass managementClass = new ManagementClass("Win32_NetworkAdapterConfiguration");  
 6             ManagementObjectCollection managementObjectCollection = managementClass.GetInstances();  
 7             foreach(ManagementObject managementObject in managementObjectCollection)  
 8             {  
 9                 if ((bool)managementObject["IPEnabled"] == true)  
10                 {  
11                     stringMAC += managementObject["MACAddress"].ToString();  
12                     string[] IPAddresses = (string[])managementObject["IPAddress"];  
13                     if (IPAddresses.Length > 0)  
14                     {  
15                         stringIP = IPAddresses[0];   
16                     }  
17                 }  
18             }  
19             txtMAC.Text = stringMAC.ToString();  
20             txtIP.Text = stringIP.ToString();  
21         }

 1    private void GetIP6()  
 2    {  
 3        Process cmd = new Process();  
 4        cmd.StartInfo.FileName = "ipconfig.exe";//设置程序名    5        cmd.StartInfo.Arguments = "/all";  //参数   
 6 //重定向标准输出    7        cmd.StartInfo.RedirectStandardOutput = true;  
 8        cmd.StartInfo.RedirectStandardInput = true;  
 9        cmd.StartInfo.UseShellExecute = false;  
10        cmd.StartInfo.CreateNoWindow = true;//不显示窗口（控制台程序是黑屏）   
11 //cmd.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;//暂时不明白什么意思   12        /* 13 收集一下 有备无患 
14        关于:ProcessWindowStyle.Hidden隐藏后如何再显示？ 
15        hwndWin32Host = Win32Native.FindWindow(null, win32Exinfo.windowsName); 
16        Win32Native.ShowWindow(hwndWin32Host, 1);     //先FindWindow找到窗口后再ShowWindow 
17        */  18        cmd.Start();  
19        string info = cmd.StandardOutput.ReadToEnd();  
20        cmd.WaitForExit();  
21        cmd.Close();  
22        textBox1.AppendText(info);  
23    }

 1 private void GetIP5()  
 2        {  
 3     //需要的命名空间   
 4            //using System.Net.NetworkInformation;   
 5            //using System.Net.Sockets;    6            string str = "";  
 7            NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();  
 8            int i = 0;  
 9            foreach (NetworkInterface adapter in adapters)  
10            {  
11   12                IPInterfaceProperties adapterProperties = adapter.GetIPProperties();  
13                UnicastIPAddressInformationCollection allAddress =  
14 adapterProperties.UnicastAddresses;  
15                if (allAddress.Count > 0)  
16                {  
17                    str += "interface   " + i + "description:\n\t " + adapter.Description + "\n ";  
18                    i++;  
19                    foreach (UnicastIPAddressInformation addr in allAddress)  
20                    {  
21                        if (addr.Address.AddressFamily == AddressFamily.InterNetworkV6)  
22                        {  
23                            ipListComb.Items.Add(addr.Address);  
24                        }  
25                        if (addr.Address.AddressFamily == AddressFamily.InterNetwork)  
26                        {  
27                            comboBox1.Items.Add(addr.Address);  
28                        }  
29   30                    }  
31                }  
32            }  
33            MessageBox.Show(str);  
34        }