blocks|key|1499468|text|默认情况下，如果没有显式设置WebRequest.Proxy+(默认情况下设置为WebRequest.DefaultWebProxy)，就会发生这种情况。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1499469|entityMap^0|14|Q|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

This happens by default, if WebRequest.Proxy is not set explicitly (by default it's set to <code>WebRequest.DefaultWebProxy</code>).

blocks|key|1499522|text|对于在使用ISA服务器时遇到问题的人，您可以尝试用以下方式设置代理：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1499523|IWebProxy+webProxy+=+WebRequest.DefaultWebProxy;
webProxy.Credentials+=+CredentialCache.DefaultNetworkCredentials;
myRequest.Proxy+=+webProxy;|code-block|syntax|javascript|1499524|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For people having problems with getting this to play nice with ISA server, you might try to set up proxy in the following manner:

<pre><code>IWebProxy webProxy = WebRequest.DefaultWebProxy;
webProxy.Credentials = CredentialCache.DefaultNetworkCredentials;
myRequest.Proxy = webProxy;
</code></pre>

blocks|key|1284725|text|我遇到了一个非常类似的情况，在默认情况下，HttpWebRequest没有获取正确的代理详细信息，并且设置UseDefaultCredentials也不起作用。然而，强制代码中的设置起到了很好的效果：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1284726|IWebProxy+proxy+=+myWebRequest.Proxy;
if+(proxy+!=+null)+{
++++string+proxyuri+=+proxy.GetProxy(myWebRequest.RequestUri).ToString();
++++myWebRequest.UseDefaultCredentials+=+true;
++++myWebRequest.Proxy+=+new+WebProxy(proxyuri,+false);
++++myWebRequest.Proxy.Credentials+=+System.Net.CredentialCache.DefaultCredentials;
}|code-block|syntax|javascript|1284727|因为这使用默认凭证，所以不应该向用户询问它们的详细信息。|1284728|请注意，这是我在这里发布的一个非常类似问题的答案的副本：Proxy+Basic+Authentication+in+C#:+HTTP+407+error|offset|length|1284729|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/9603093/407-proxy-authentication-required-in-c-sharp/18013423#18013423^0|0|0|0|S|1C|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|X|8|@]|9|@$K|Y|L|Z|1|10]]|A|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

I was getting a very similar situation where the HttpWebRequest wasn't picking up the correct proxy details by default and setting the UseDefaultCredentials didn't work either. Forcing the settings in code however worked a treat:
<pre><code>IWebProxy proxy = myWebRequest.Proxy;
if (proxy != null) {
 string proxyuri = proxy.GetProxy(myWebRequest.RequestUri).ToString();
 myWebRequest.UseDefaultCredentials = true;
 myWebRequest.Proxy = new WebProxy(proxyuri, false);
 myWebRequest.Proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;
}
</code></pre>
and because this uses the default credentials it should not ask the user for their details.
Note that this is a duplicate of my answer posted here for a very similar problem: <a href="https://stackoverflow.com/questions/9603093/407-proxy-authentication-required-in-c-sharp/18013423#18013423">Proxy Basic Authentication in C#: HTTP 407 error</a>

Is it possible to detect/reuse those settings ?

How ?

The exception i'm getting is
This is the exception while connecting to <a href="http://www.google.com" rel="noreferrer">http://www.google.com</a>

<pre><code>System.Net.WebException: Unable to connect to the remote server ---&gt;
 System.Net.Sockets.SocketException: A connection attempt failed because the
 connected party did not properly respond after a period of time, or established
 connection failed because connected host has failed to respond 66.102.1.99:80

 at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, 
 SocketAddress socketAddress)
 at System.Net.Sockets.Socket.InternalConnect(EndPoint remoteEP)
 at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure,
 Socket s4, Socket s6, Socket&amp; socket, IPAddress&amp; address,
 ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout,
 Exception&amp; exception)
 --- End of inner exception stack trace ---
 at System.Net.HttpWebRequest.GetResponse()
 at mvcTest.MvcApplication.Application_Start() in
 C:\\home\\test\\Application1\\Application1\\Program.cs:line 33"
</code></pre>

How to AutoDetect/Use IE proxy settings in .net HttpWebRequest

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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是否可以检测/重用这些设置？怎么做到的？我得到的异常是这是连接到时的异常System.Net.WebException: Unable to connect to the remote server --->  System.Net.Sockets.SocketException: A connection attem...

问如何在.net HttpWebRequest中自动检测/使用IE代理设置
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