Proxy Credentials for web requests

TO make WebRequests from behind a firewall, we need to attach a proxy object to our request.

    
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL); 
//Create proxy credentials 
ICredentials credential = new NetworkCredential(uid, password, domain); 
//Create proxy server. byPassListArray is a string array of local ip's to bypass 
IWebProxy proxyServer = new WebProxy(proxy,true,byPassListArray,credential); 

request.Proxy = proxyServer; 
request.Credentials = new NetworkCredential(Uid,Password); 

example code snippet: 

string query="http://www.feedster.com/search.php?type=rss&q=" +srch+ "&sort=date&limit=100"; 
WebProxy proxyObj = new WebProxy("10.10.249.19", 8080) ; 
NetworkCredential networkCredential = new NetworkCredential("yourname", "yourpass") ; 
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(query) ; 
proxyObj.Credentials = networkCredential ; 
req.Proxy = proxyObj ; 
// this request uses the default credential set-- 
req.Credentials = System.Net.CredentialCache.DefaultCredentials ; 
// or we can create unique new credentials: 
//request.Credentials = new NetworkCredential(Uid,Password); 

XmlDocument doc = new XmlDocument(); 
System.Net.HttpWebResponse resp =(HttpWebResponse)req.GetResponse() ; 
doc.Load(resp.GetResponseStream()); 
XmlDocumentFragment frag = doc.CreateDocumentFragment(); 
XmlNode nod=doc.SelectSingleNode("//channel/item");