How to send SMS from windows application using c#.net?

Following is one example to do this:-

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO.Ports;
using System.Threading;


namespace SMSWinApp
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private SerialPort _serialPort;
        private void button1_Click(object sender, EventArgs e)
        {
            string number = textBox1.Text;
            string message = txtMessage.Text;




            //Replace "COM8"withcorresponding port name
           _serialPort = new SerialPort("COM8", 115200);


            Thread.Sleep(100);

            _serialPort.Open();

            Thread.Sleep(100);

            _serialPort.Write("AT+CMGF=1\r");

            Thread.Sleep(100);

            _serialPort.Write("AT+CMGS=\"" + number + "\"\r\n");

            Thread.Sleep(100);

            _serialPort.Write(message + "\x1A");

            Thread.Sleep(300);

            label1.Text = "Message sent !!";

            _serialPort.Close();
        }
    }
}