using System;

using System.Net;

using System.Web;

​

​

  public class Program

  {

    public static void Main()

    {

​

      string apiToken = "xxxxxxr"; //Your Token At Lifetimesms.com

      string apiSecret = "xxxx"; //Your secret At Lifetimesms.com            

      string message_ids = "xxxxxxxx,xxxxxxxx,xxxxxxxx"; //Your secret At Lifetimesms.com    

        string jsonResponse = Check_delivery(apiToken, apiSecret, message_ids);

      Console.Write(jsonResponse);

      //Console.Read(); //to keep console window open if trying in visual studio

    }

​

    public static string Check_delivery(string apiToken, string apiSecret,  string message_ids)

    {

      String URI = "http://Lifetimesms.com" +

        "/delivery-inquiry?" +

          "api_token=" + apiToken +

          "&api_secret=" + apiSecret +

          "&messageid=" + message_ids;

      try

      {

        WebRequest req = WebRequest.Create(URI);

        WebResponse resp = req.GetResponse();

        var sr = new System.IO.StreamReader(resp.GetResponseStream());

        return sr.ReadToEnd().Trim();

      }

      catch (WebException ex)

      {

        var httpWebResponse = ex.Response as HttpWebResponse;

        if (httpWebResponse != null)

        {

          switch (httpWebResponse.StatusCode)

          {

            case HttpStatusCode.NotFound:

              return "404:URL not found :" + URI;

              break;

            case HttpStatusCode.BadRequest:

              return "400:Bad Request";

              break;

​

            default:

              return httpWebResponse.StatusCode.ToString();

          }

        }

      }

      return null;

    }

  }