C# .NET API Kit

using System;
using System.Text;
using System.Xml;
using System.IO;
using System.Net;

namespace ExampleXML
{
    class Program
    {
        static string url = "http://sms.message-platform.com/xml/send.aspx";
        static void Main(string[] args)
        {
            // Set Debug to true to output request and response XML
            bool debug = true;
            // Account Parameters
            string username = "My_User";
            string password = "My_Pass";
            string content = "Mediaburst XML API Test - C# Example";
            /*
             Numbers to send to
             Normally this would come from your database/application
            */
            string[] numbers = { "447000000001", "447000000002", "447000000abc" };
            // Build the XML request to send
            XmlDocument sendDoc = new XmlDocument();
            XmlDeclaration myDec = sendDoc.CreateXmlDeclaration("1.0", "utf-8", null);
            XmlElement messageList = sendDoc.CreateElement("Message");
            sendDoc.AppendChild(messageList);
            XmlElement usernameTag = sendDoc.CreateElement("Username");
            usernameTag.InnerText = username;
            messageList.AppendChild(usernameTag);
            XmlElement passwordTag = sendDoc.CreateElement("Password");
            passwordTag.InnerText = password;
            messageList.AppendChild(passwordTag);
            // Create an SMS Element for each recipient
            foreach (string number in numbers)
            {
                XmlElement smsTag = sendDoc.CreateElement("SMS");
                XmlElement toTag = sendDoc.CreateElement("To");
                toTag.InnerText = number;
                smsTag.AppendChild(toTag);
                XmlElement contentTag = sendDoc.CreateElement("Content");
                contentTag.InnerText = content;
                smsTag.AppendChild(contentTag);
                messageList.AppendChild(smsTag);
            }
            if (debug)
                Console.WriteLine("Request: " + sendDoc.OuterXml);
            try
            {
                XmlDocument respDoc = SendXmlDoc(sendDoc);
                if (debug)
                    Console.WriteLine("Response: " + respDoc.InnerXml);
                int errNo = 0;
                string errDesc = String.Empty;
                foreach (XmlNode docChild in respDoc.DocumentElement.ChildNodes)
                {
                    switch (docChild.Name)
                    {
                        case "SMS_Resp":
                            string msgTo = String.Empty;
                            string msgId = String.Empty;
                            int msgErrNo = 0;
                            string msgErrDesc = String.Empty;
                            foreach (XmlNode respNode in docChild.ChildNodes)
                            {
                                switch (respNode.Name)
                                {
                                    case "To":
                                        msgTo = respNode.InnerText;
                                        break;
                                    case "MessageID":
                                        msgId = respNode.InnerText;
                                        break;
                                    case "ErrNo":
                                        int.TryParse(respNode.InnerText, out msgErrNo);
                                        break;
                                    case "ErrDesc":
                                        msgErrDesc = respNode.InnerText;
                                        break;
                                }
                            }
                            if (msgErrNo > 0)
                            {
                                Console.WriteLine("To: " + msgTo+" Error "+msgErrNo+": "+msgErrDesc);
                            }
                            else
                            {
                                Console.WriteLine("To: " + msgTo + " ID: " + msgId);
                            }
                            break;
                        case "ErrNo":
                            int.TryParse(docChild.InnerText ,out errNo);
                            break;
                        case "ErrDesc":
                            errDesc = docChild.InnerText;
                            break;
                    }
                }
                if (errNo > 0)
                {
                    Console.WriteLine("Error in request");
                    Console.WriteLine("Error Number: " + errNo + " Description: " + errDesc);
                }
            }
            catch (WebException ex)
            {
                Console.WriteLine("Web Exception: " + ex.Message);
            }
            catch (XmlException ex)
            {
                Console.WriteLine("Xml Exception: " + ex.Message);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Exception: " + ex.Message);
            }
        }
        /// <summary>
        /// POSTs the XML document to Mediaburst API webserver
        /// </summary>
        /// <param name="myDoc">XML Document containing SMS messages</param>
        /// <returns>XML Document from the API</returns>
        static private XmlDocument SendXmlDoc(XmlDocument myDoc)
        {
            byte[] buffer = Encoding.UTF8.GetBytes(myDoc.OuterXml);
            WebRequest myRequest = WebRequest.Create(url);
            myRequest.ContentType = "text/xml";
            myRequest.ContentLength = buffer.Length;
            myRequest.Method = "POST";
            Stream myStream = myRequest.GetRequestStream();
            myStream.Write(buffer, 0, buffer.Length);
            WebResponse myResponse = myRequest.GetResponse();
            if (((HttpWebResponse)myResponse).StatusCode == HttpStatusCode.OK)
            {
                XmlReaderSettings readSettings = new XmlReaderSettings();
                readSettings.IgnoreWhitespace = true;
                readSettings.ValidationType = ValidationType.None;
                XmlReader myXmlRead = XmlReader.Create(myResponse.GetResponseStream(), readSettings);
                XmlDocument respDoc = new XmlDocument();
                respDoc.Load(myXmlRead);
                return respDoc;
            }
            else
            {
                throw new WebException("Non 200 Status Code:"+ ((HttpWebResponse)myResponse).StatusCode.ToString());
            }
        }
    }
}