Please test my code Is thread concept is fine

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Threading;

using System.Net;

using System.IO;

using System.Collections;

using System.Diagnostics;

namespace SendSMSThreading

public partial class Form1 : Form

static readonly object padlock = new object();

Connection objCon = new Connection();

int NumberOfThread = 10;

public Form1()

private void SendSMS1(DataRow dr_SMS)

lock (padlock)

try

string qry = "http://144.56.58.164:80/login/pushsms.php?login=XXXXXXXXX&pass=XXXXXXXXXX&sender_name=" + dr_SMS["SenderID"].ToString() + "&mob_no=91" + dr_SMS["MobileNo"].ToString() + "&text=" + dr_SMS["Text"].ToString();

WebRequest wReq = WebRequest.Create(qry);

WebResponse wResp = wReq.GetResponse();

Stream respStream = wResp.GetResponseStream();

StreamReader reader = new StreamReader(respStream);

String respHTML = reader.ReadToEnd();

Connection.UpdateStatus_SMSLogThread1("Delivered", Convert.ToInt32(dr_SMS["ID"]));

catch (Exception ex)

Connection.UpdateStatus_SMSLogThread1("Failed", Convert.ToInt32(dr_SMS["ID"]));

private void timer1_Tick(object sender, EventArgs e)

timer1.Enabled = false;

ProcessThreadCollection threadcol = Process.GetCurrentProcess().Threads;

if (threadcol.Count < NumberOfThread )

DataTable dt_SMS = objCon.SelectRecord_FromSMSlogThread1();

if (dt_SMS == null || dt_SMS.Rows.Count <= 0)

timer1.Enabled = true;

return;

else

foreach (DataRow dr in dt_SMS.Rows)

Thread SMSThread = new Thread(delegate()

Thread.Sleep(120);

timer1.Enabled = true;

private void Form1_Load(object sender, EventArgs e)

this.Location = new Point(0, 60);

btnStart_Click(null, null);

private void btnStart_Click(object sender, EventArgs e)

timer1.Enabled = true;

btnStart.Enabled = false;

btnStop.Enabled = true;

private void btnStop_Click(object sender, EventArgs e)

btnStop.Enabled = false;

timer1.Enabled = false;

btnStart.Enabled = true;