如何在C＃中獲取當前的DNS服務器？

Question

如何在C＃中獲取當前的DNS服務器？

Answer 1

有關示例代碼，請參閱IPInterfaceProperties.DnsAddresses上的MSDN。

Answer 2

我最近正在嘗試做同樣的事情，發現了Robert Sindal的excellent example。

using System; 
using System.Net; 
using System.Net.NetworkInformation; 

namespace HowToGetLocalDnsServerAddressConsoleApp 
{ 
    class Program 
    { 
     static void Main(string[] args) 
     { 
      Console.WriteLine(GetDnsAdress()); 
      Console.ReadKey(); 
     } 

     private static IPAddress GetDnsAdress() 
     { 
      NetworkInterface[] networkInterfaces = NetworkInterface.GetAllNetworkInterfaces(); 

      foreach (NetworkInterface networkInterface in networkInterfaces) 
      { 
       if (networkInterface.OperationalStatus == OperationalStatus.Up) 
       { 
        IPInterfaceProperties ipProperties = networkInterface.GetIPProperties(); 
        IPAddressCollection dnsAddresses = ipProperties.DnsAddresses; 

        foreach (IPAddress dnsAdress in dnsAddresses) 
        { 
         return dnsAdress; 
        } 
       } 
      } 

      throw new InvalidOperationException("Unable to find DNS Address"); 
     } 
    } 
}