什么是Dns.GetHostEntry方法（String）实际上做？ [英] What does Dns.GetHostEntry Method(String) actually do?

问题描述

我找不到这是什么实际执行文件中的任何适当的说明。

I can't find any proper description in the documentation for what this actually does.

不会检查的记录或CNAME记录或两者的存在？

Does it check for the existence of A records or CNAME records or both?

我的理解是，在.NET 4中，这将引发SocketException异常，如果主机不存在了，这是我的测试证实。

My understanding is that in .NET 4, this throws a SocketException if the host does not exist, and this is confirmed by my testing.

推荐答案

这是

var ips = System.Net.Dns.GetHostEntry("microsoft.com").AddressList;
foreach (var ip in ips)
    Console.WriteLine(ip);

// output
64.4.11.37
65.55.58.201

而这些都来自network-tools.com拉A记录，DNS查询。

And these are the A records pulled from network-tools.com, DNS query.

Answer records
microsoft.com       A   64.4.11.37  
microsoft.com       A   65.55.58.201

所以，我会说这不拉记录。

So I'd say it does pull A records.

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