set default proxy programmatically instead of using app.config

Question

Being behind a proxy, my .Net 4.0 C# application only works when there is an app.config with the following content:

<system.net>
    <defaultProxy enabled="true" useDefaultCredentials="true">
        <proxy />
        <bypasslist />
        <module />
    </defaultProxy>
</system.net>

Now since I don't want to have an app.config and since embedding app.config is not recommended, what is the C# code that has the same effect as that xml chunk in the app.config and where do I place it?

I need a solution to this problem so bad!! I've been consistently hitting this problem in a number of environments for years now... — Nacht
– Nacht, Commented Jun 2, 2016 at 0:24

L.B · Accepted Answer · 2012-08-21 09:57:53Z

18

You can use WebRequest.DefaultWebProxy or GlobalProxySelection.Select

System.Net.GlobalProxySelection.Select = new WebProxy(ip,port);

OR

System.Net.WebRequest.DefaultWebProxy = new WebProxy(ip,port);

answered Aug 21, 2012 at 9:57

L.B

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1 Comment

torpederos Over a year ago

System.Net.GlobalProxySelection is deprecated.

Patrick McDonald · Accepted Answer · 2014-06-17 11:19:44Z

9

The following code worked for me:

System.Net.WebRequest.DefaultWebProxy.Credentials 
    = System.Net.CredentialCache.DefaultNetworkCredentials;

answered Jun 17, 2014 at 11:19

Patrick McDonald

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Comments

perilbrain · Accepted Answer · 2012-08-21 07:55:52Z

2

you can use WebProxy from System.Net

WebProxy proxyObject = new WebProxy("PROXYIP",PORTNO);
WebRequest req = WebRequest.Create("http://www.stackoverflow.com");
req.Proxy = proxyObject;

More details at MSDN

answered Aug 21, 2012 at 7:55

perilbrain

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1 Comment

Nik Over a year ago

This would not change the proxy for the whole app like the app.config would, just this single request.

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