you may read many article in web about how to make a page
not to be cached using meta tags like that in the head
section -

we know different file types like html,jpeg,gif,pdf,
doc,etc handled by different browsers like IE,
firefox,opera,etc.the situation can come when the
browser can't handle the file type,it will ask
to save or open that file.

code behind file codes -

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

the following javascript codes will help you find
out the browser details by some javascript functions

it's needed to show nice tips through out the web page.basically
you will show tips in a basic popup on a html element click.it
will also show nice arrow pointing to where the click arised -

Sql server knows many data types.it's worth our
while to know most common types -