C#

HttpWebRequest req = (HttpWebRequest)WebRequest.Create(requestUrl);
            req.Method = "POST";
            req.ContentType = "application/x-www-form-urlencoded";
            req.ContentLength = buffer.Length;
            req.Proxy = new WebProxy(proxy, true); // ignore for local addresses
            req.CookieContainer = new CookieContainer(); // enable cookies

            Stream reqst = req.GetRequestStream(); // add form data to request stream
            reqst.Write(buffer, 0, buffer.Length);
            reqst.Flush();
            reqst.Close();

            Console.WriteLine("\nPosting 'red' to " + requestUrl);
            HttpWebResponse res = (HttpWebResponse)req.GetResponse(); // send request, getresponse
            Console.WriteLine("\nResponse stream is: \n");
            string eq=res.GetResponseStream().ToString();
            Stream resst = res.GetResponseStream(); // display HTTP response
            StreamReader sr = new StreamReader(resst);
            Console.WriteLine(sr.ReadToEnd());
            Console.ReadLine()

$siteName = (Get-Wmiobject -computer "TestMachine" -namespace "root/MicrosoftIISv2" -q "SELECT * FROM IIsWebServerSetting WHERE ServerComment = "Default Web Site").Name