C # How to Use httpwebrequest to access a webpage through proxy

String urlstr = "http://www.itstrike.cn"; // set the address httpwebrequest HWR = (httpwebrequest) httpwebrequest. create (urlstr); // create the httpwebrequest object HWR. timeout = 60000; // defines the server timeout time. WebProxy proxy = new WebProxy (); // defines a gateway object proxy. address = new uri ("http://proxy.domain.com: 3128"); // gateway server port: Port proxy. credentials = new networkcredential ("f3210316", "6978233"); // use the secret name and password HWR. usedefaultcredentials = true; // enable gateway authentication HWR. proxy = proxy; // set the Gateway