C#

HttpWebResponse authResponse = null;
			StreamReader responseStreamReader = null;

			try
			{
				byte[] requestBytes = Encoding.UTF8.GetBytes(this.txtRequest.Text);

				HttpWebRequest authRequest = (HttpWebRequest)WebRequest.Create(new Uri(this.txtAuthURI.Text));

				authRequest.Method = "POST";
				authRequest.Credentials = CredentialCache.DefaultCredentials;
				authRequest.ContentType = "text/xml";
				authRequest.ContentLength = requestBytes.Length;

				Stream requestStream = authRequest.GetRequestStream();
				requestStream.Write(requestBytes, 0, requestBytes.Length);
				requestStream.Flush();
				requestStream.Close();
				
				authResponse = (HttpWebResponse)authRequest.GetResponse();

				responseStreamReader = new StreamReader(authResponse.GetResponseStream());

				StringBuilder sb = new StringBuilder();

				sb.AppendFormat("HTTP Status: {0}{1}", authResponse.StatusCode, Environment.NewLine);

				this.txtResponse.Text = sb.ToString();
			}
			catch (Exception ex)
			{
				MessageBox.Show(this, "Cannot send Auth Request: " + ex.GetType().ToString() + ": " + ex.Message);
			}
			finally
			{
				if (null != responseStreamReader)
				{
					responseStreamReader.Close();
				}

				if (null != authResponse)
				{
					authResponse.Close();
				}
			}