this techniques works well with internet explorer browser and
firefox may be.but this not works will all browsers including
Chrome,opera...

but the following codes will definitely disable cache for the page
concerned in all browsers-

protected void Page_Init(object sender, EventArgs e)
{
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.Cache.SetExpires(DateTime.Now.AddSeconds(-1));
Response.Cache.SetNoStore();
}