如何通过hostname获取已使用IPv6协议的IPv4地址

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Net;
 5 using System.Web;
 6 
 7 namespace FXBVT_Team.CheckFilePath
 8 {
 9     public class IPNetworking
10     {
11         public static string GetIP4Address(string hostAddress)
12         {
13             string IP4Address = String.Empty;
14 
15             foreach (IPAddress IPA in Dns.GetHostAddresses(hostAddress))
16             {
17                 if (IPA.AddressFamily.ToString() == "InterNetwork")
18                 {
19                     IP4Address = IPA.ToString();
20                     break;
21                 }
22             }
23 
24             if (IP4Address != String.Empty)
25             {
26                 return IP4Address;
27             }
28 
29             foreach (IPAddress IPA in Dns.GetHostAddresses(Dns.GetHostName()))
30             {
31                 if (IPA.AddressFamily.ToString() == "InterNetwork")
32                 {
33                     IP4Address = IPA.ToString();
34                     break;
35                 }
36             }
37 
38             return IP4Address;
39         }
40 
41     }
42 }