I\'m developing a twitter messaging utility using Twitter API (twitterizer). But since I\'m within a corporate proxy, I\'m getting the error \'407 Proxy Authentication Required\
This does not answer your question. But the error you are getting is clearly a Proxy authentication error.
You might want to either disable or enable the proxy.
To disable the proxy, in the App.config file add the following configuration
To enable the proxy and to use the default proxy settings(specified in IE) add this configuration in your App.config