Ajax is the best technique for showing & updating
data without page refresh.
jquery ajax make things possible easier way.in this
post i will show how to pass data via jquery ajax
and get back data.

asp.net has default password recovery control and methods
to implement password recovery.you just need to use
asp.net membership provider in your app and add the
PasswordRecovery control in a page by which you want
to recover password.

List<> can be used as a collection of objects which
can be accessed by index.List originated from
System.Collections.Generic class.List objects can
be sorted,searched,manipulated.so List is very
useful in programming for holding any type of
objects.following shows a example of List<> -

ASP.NET controls automatically keep their data
when page is sent to the server in response to
events (like a user clicking a button).
this persistence of data is called view state

sometimes needed that html tags from a html string
to be removed.there are many purposes to do that.
there are many ways this can be achieved in client side
using jquery and javascript -

by the following way you can resize a image to a predefined
dimension and resolution.you can also use it to make a image
thumbnails.

there are different kind of joins available by sql like
inner join,left join,etc.by the following example i will show
how to do left join which i used in my application to
get data from two tables -