Set Key In AppSetting

 <appSettings>
    <add key="ApplicationName" value="AppName" />
    <add key="Company" value="Company Name" />
    <add key="CompanyURL" value="Url" />
  </appSettings>

Send Message From own site to Mobile

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.yoursite.www.SendSMS smsIndia= new SmsTest.net.yoursite.www.SendSMS();
SmsTest.com.yoursite.www.SendSMSWorld smsWorld =new SmsTest.com.yoursite.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;
}
}