How to disable browser's back button

check this out:

Browser back button issue after logout[^]

hope it helps :)

To add to Prerak's answer, have a look at following links :
1. Three ways to disable browser back button[^]
2. Use Javascript to restrict user from pressing back button in browser[^]
3. A Thorough examination of browser back button[^]
4. Simple solution[^]

Many of the experts suggest not to disable expected browser behaviour. Instead make your pages handle the possibility of users going back. In other words redirect the user to certain page when user tries to press back button.

Hope this helps.
All the best.

Try this code also

<script type="text/javascript" language="javascript">
window.history.forward(1);
document.attachEvent("onkeydown", my_onkeydown_handler);
function my_onkeydown_handler()
{
switch (event.keyCode)
{
case 116 : // F5;
event.returnValue = false;
event.keyCode = 0;
window.status = "We have disabled F5";
break;
}
}
</script>

and use this one in code behind

Session.Clear();
Session.Abandon();

Happy code....

On code behind write this:

protected void Page_Load(object sender, EventArgs e)
   {
      
     HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
     HttpContext.Current.Response.Cache.SetNoServerCaching();
     HttpContext.Current.Response.Cache.SetNoStore();
    

   }

and on client side write something like this:

<script type="text/javascript" language="javascript">
window.history.forward(1);
document.attachEvent("onkeydown", my_onkeydown_handler);
function my_onkeydown_handler()
{
switch (event.keyCode)
{
case 116 : // F5;
event.returnValue = false;
event.keyCode = 0;
window.status = "We have disabled F5";
break;
}
}
</script>