The abstract class indicates that a class may be used
as a base class for other classes and is not instantiable.

One great job programmers do is to convert one type to
another type.there are 2 type of conversions.

if you want to use nice jquery slider in your asp.net website
follow the steps below -

It's a good idea to identify the errors at run time to detect
and handle it. .Net framework has built in mechanism for that.
these exceptions occurs because of user,logic and system errors.

It's a good practice to show orange border when you set focus to textbox.
also the border will stay for some seconds.this way user know
that they have to do task on that textbox.

It's needed to get the current date and time of the user
computer for processing using javascript.

the following codes will help you to implement check all
or uncheck all capability in the gridview.in that case
when header check box checked all items check box will
be checked and vice versa.