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;

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 -

It's a very common requirement to create different types of button and
it's click event handler dynamically in asp.net application.

stored procedures allow flexibility by offering capabilities like
conditional logic.a single procedure may execute a set of SQL
statements which are really complex.

System.Net namespace is for dealing with networking.It
is concerned with operations like downloading, uploading
files,making requests by http protocols.