using System;

using System.IO;

using System.Net;

using System.Text;

using System.Text.RegularExpressions;

public class Program

{

    public void Main()

    {

        string phone = "6158033510";

        Console.WriteLine(ValidatePhoneNumberFormat(phone));

        //SendSms(phone, "Test");

    }

    public static void SendSms(string phoneNumber, string message)

    {       

        WebRequest req = WebRequest.Create(string.Format("{0}/sending/messages?format=xml", "https://app.eztexting.com"));

        req.Method = "POST";

        req.ContentType = "application/x-www-form-urlencoded";

​

        using (Stream writeStream = req.GetRequestStream())

        {

            byte[] bytes = Encoding.UTF8.GetBytes(string.Format("User={0}&Password={1}&PhoneNumbers={2}&Message={3}",

                "hcbluebook", "M@kinM30wsic", phoneNumber, message));

​

            writeStream.Write(bytes, 0, bytes.Length);

        }

​

        string respBody;

        try

        {

            using (HttpWebResponse resp = (HttpWebResponse) req.GetResponse())

            {

                using (StreamReader reader = new StreamReader(resp.GetResponseStream(), Encoding.UTF8))

                {

                    respBody = reader.ReadToEnd();

                }

​

                if (resp.StatusCode != HttpStatusCode.Created)

                    throw new Exception(string.Format("Response from SMS gateway was not good: {0} - {1}", resp.StatusCode, respBody));

            }

        }

        catch (Exception e)

        {

            throw e;

        }

    }

    public static bool ValidatePhoneNumberFormat(string phoneNumber)

    {

        return Regex.Match(phoneNumber, @"^([0-9]{10})$").Success;

    }

​

    public static bool ValidateMessageLength(string messsage)

    {

        return messsage.Length <= 160;

    }

}