IM Proxy settings in app.config

Question

I'm writing a chat application for google talk using XMPP in .NET (with agsXMPP.dll library). The chat application's login fails in my office because there is a specific proxy for IM. How to explicitly specify the proxy details. Can it be done in app.config?

My gtalk settings which works fine for gtalk: Host:improxy Port:8085 Proxy requires authentication:false

Answer 1

This will use system default proxy

    <system.net>
      <defaultProxy>
        <proxy usesystemdefault="true" />
      </defaultProxy>
    </system.net>

and this your specify

<system.net>
  <defaultProxy enabled="true">
   <proxy bypassonlocal="true"
          proxyaddress="http://proxy.domain.org:8888/" />
  </defaultProxy>
 </system.net>

see here and here