Hi
We can disable the backward functionality on logout click in asp.net by clearing the cache memory of that page. We can write the code for clear the cache memory on master page or secure private page like this
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;public partial class SiteMaster : System.Web.UI.MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{Response.Buffer = true;
Response.CacheControl = “no-cache”;
if (Session[“Name”] == null)
{
Response.Redirect(“Login.aspx”);
}
Label1.Text = Session[“Name”].ToString();}
protected void LinkButton1_Click(object sender, EventArgs e)
{
Session[“Name”] = null;
Response.Redirect(“Login.aspx”);}
}
Chandradev's Blog 
gr8 job..the best working code i found on the internet….thankx
Hi shantu,
You are welcome. I m glad to know that my code helped you.
Regards
Chandradev
Can you have sample sms web application using linq C# sql etc? thanks in advacne
Dear friend, That code is not fixed. That will depend on service provider. So what ever i will give code,that maight not be work in your project. SMS service provide will give the api code for sending sms from website.