How to Specify User Credentials in Config File

[Rajiv Das]

..Net 2.0
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Assume I am on a non-domain network. The proxy asks me to authenticate
whenever I want to access the net.

I have an app, through which I wish to access web sites using HttpWebRequest.

Now in the config file snippet below:
<system.net>
<defaultProxy useDefaultCredentials="false">
<proxy proxyaddress="http://proxy:80" bypassonlocal="True"
usesystemdefault="False"/>
</defaultProxy>
</system.net>

.... useDefaultCredentials="false".

How do I specify credentials from the config file? I cannot hard-code this
since I have users on domain machines that don't need this extra-data and
logic.1
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Thanks
Rajiv Das