I want to send `SMS` to bulk of users(4000 user) so i put the following method on loop :

```
protected int SendSMS(string url)
        {
            // Now to Send Data.

            StreamWriter writer = null;
            StringBuilder postData = new StringBuilder();
            Uri myUri = new Uri(url);
            postData.Append(HttpUtility.ParseQueryString(myUri.Query).Get("Username"));
            postData.Append(HttpUtility.ParseQueryString(myUri.Query).Get("Password"));
            postData.Append(HttpUtility.ParseQueryString(myUri.Query).Get("Sender"));
            postData.Append(HttpUtility.ParseQueryString(myUri.Query).Get("Recipients"));
            postData.Append(HttpUtility.ParseQueryString(myUri.Query).Get("MessageData"));

            string webpageContent = string.Empty;
            byte[] byteArray = Encoding.UTF8.GetBytes(postData.ToString());
            HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
            webRequest.Method = "POST";
            webRequest.ContentType = "application/x-www-form-urlencoded";
            webRequest.ContentLength = webRequest.ContentLength = byteArray.Length;

            writer = new StreamWriter(webRequest.GetRequestStream());

            try
            {
                using (Stream webpageStream = webRequest.GetRequestStream())
                {
                    webpageStream.Write(byteArray, 0, byteArray.Length);
                }

                using (HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse())
                {
                    using (StreamReader reader = new StreamReader(webResponse.GetResponseStream()))
                    {
                        webpageContent = reader.ReadToEnd();
                        //TODO:parse webpagecontent: iF response contains "OK"
                        if (webpageContent.Contains("OK")) return 1;
                        else return 0;
                    }
                }
                //return 1;

            }
            catch (Exception ee)
            {
                ErrMapping.WriteLog(url);
                string error = ee.Message + "<br><br>Stack Trace : " + ee.StackTrace;
                ErrMapping.WriteLog(error);
                return -1;
            }

        }

```

---

After a specific number of users like 65 user, no `sms` had been sent for the rest of users and

I get the following exception :

```
Error Message:Thread was being aborted.<br><br>Stack Trace :    at System.Net.UnsafeNclNativeMethods.OSSOCK.recv(IntPtr socketHandle, Byte* pinnedBuffer, Int32 len, SocketFlags socketFlags)
   at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, SocketError& errorCode)
   at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
   at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size)
   at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead)
   at System.Net.ConnectStream.ProcessWriteCallDone(ConnectionReturnResult returnResult)
   at System.Net.HttpWebRequest.CheckDeferredCallDone(ConnectStream stream)
   at System.Net.HttpWebRequest.GetResponse()
   at SendSMS_EmailUI.Frm_SMS_send.SendSMS(String url) 

```