How to send SMS to Mobile using web application ASP.Net & C#?

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.Mail;

using System.Web.Services.Protocols;

using System.Web.Services;



public partial class _Default : System.Web.UI.Page 

{

 protected void Page_Load(object sender, EventArgs e)

 {



 }

 protected void Button1_Click(object sender, EventArgs e)

 {

  try

 {

   

  SmsTest.net.webservicex.www.SendSMS smsIndia= 

     new SmsTest.net.webservicex.www.SendSMS();

  SmsTest.com.webservicex.www.SendSMSWorld smsWorld =  

   new SmsTest.com.webservicex.www.SendSMSWorld();

  if(rdoType.SelectedValue == "1")

   smsIndia.SendSMSToIndia(TextBox3.Text.Trim(), 

     TextBox1.Text.Trim(), TextBox4.Text);

  else 

   smsWorld.sendSMS(TextBox1.Text.Trim(), 

     TextBox2.Text.Trim(), 

     TextBox3.Text.Trim(), TextBox4.Text);

  lblMessage.Visible = true;

  lblMessage.Text = "Message Send Succesfully";

 }

  catch (Exception ex)

  {

   lblMessage.Visible = true;

   lblMessage.Text = "Error in Sending message" + ex.ToString();

 }



 }





private void rdoType_SelectedIndexChanged(object sender, System.EventArgs e)

{

 if(rdoType.SelectedValue =="1")

   TextBox2.Enabled = false;

 else

   TextBox2.Enabled = false;

}



}