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

when you process credit card payment the two
most sensitive inputs are taken from customer
are card number and card security code.you
will want to verify that the data entered
is valid before processing credit card payment.

we can use DataSet to populate DataList or
GridView efficiently.DataSet is the best
option for accessing rows of tables.

you will need to access html elements from asp.net
code behind file.i show you how to access widely used
html textarea element from code behind file -

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

to create and use the object instances on remote machines .Net remoting
is used,without any DCOM involved.

this article will cover .net remoting with common hosting method in IIS.

using SMO classes one can backup a sql server database
in .bak extension.It's a programming approach to backup
database.there are other ways but using SMO classes it
is efficient and error free.