Specifying a proxy to use with DotNetOpenID

I'm using DotNetOpenID to provide relying party OpenID support for our website. All external requests have to be brokered via a proxy server, and I'm looking for a way to tell DotNetOpenID to use this proxy. I know I can set up a global proxy config in web.config, but I currently only want this to apply to the calls made to the OpenID provider during authentication. Is this possible?

From stackoverflow

• I ended up solving this by using specifing a proxy in web.config, with a bypasslist specified so only external requests would use the proxy server:

  <system.net>
    <defaultProxy>
      <proxy
        usesystemdefault = "false"
        proxyaddress="http://myproxyserver:8080"
        bypassonlocal="true"
      />
      <bypasslist>
        <add address="[a-z]+\.mydomain\.com"/>
        <add address="[a-z]+\.myotherdomain\.com"/>
      </bypasslist>
    </defaultProxy>
  </system.net>