gistfile1.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Twilio;

namespace ConsoleApplication17
{
    class Program
    {
        static void Main(string[] args)
        {
            M m = new M();
            Task task = m.Run();
            task.Wait();

            Console.Read();
        }

    }

    public class M
    {
        public async Task Run()
        {
            var result1 = await SendSmsMessageAsync("3144586142", "Hello Async World");
            Console.WriteLine(result1.IsSuccessful);
            Console.WriteLine(result1.Message);

            var result2 = M.SendSmsMessage("3144586142", "Hello World");
            Console.WriteLine(result2.IsSuccessful);
            Console.WriteLine(result1.Message);

        }

        public static async Task<SmsResponse> SendSmsMessageAsync(string phoneNumber, string message)
        {
            var twilio = new TwilioRestClient("AC3137d76457814a5eabf7de62f346d39a", "01e8896765b4c7798e0f9d888948a9b2");
            var twilioMessage = await twilio.SendSmsMessage("+14046668238", NormalizePhoneNumber(phoneNumber), message);

            return new SmsResponse
            {
                IsSuccessful = twilioMessage.RestException == null,
                Message = twilioMessage.RestException != null ? twilioMessage.RestException.Message : "",
                ApiTransactionId = twilioMessage.Sid,
                ChargeAmount = twilioMessage.Price,
                NormalizedPhoneNumber = twilioMessage.To
            };
        }

        public static SmsResponse SendSmsMessage(string phoneNumber, string message)
        {
            var twilio = new TwilioRestClient("AC3137d76457814a5eabf7de62f346d39a", "01e8896765b4c7798e0f9d888948a9b2");
            var twilioMessage = twilio.SendSmsMessage("+14046668238", NormalizePhoneNumber(phoneNumber), message).Result;

            return new SmsResponse
            {
                IsSuccessful = twilioMessage.RestException == null,
                Message = twilioMessage.RestException != null ? twilioMessage.RestException.Message : "",
                ApiTransactionId = twilioMessage.Sid,
                ChargeAmount = twilioMessage.Price,
                NormalizedPhoneNumber = twilioMessage.To
            };
        }

        public static string NormalizePhoneNumber(string number)
        {
            return number;
        }

    }

    public class SmsResponse
    {
        public bool IsSuccessful { get; set; }
        public string Message { get; set; }
        public string ApiTransactionId { get; set; }
        public decimal ChargeAmount { get; set; }
        public string NormalizedPhoneNumber { get; set; }
    }
}