namespaces is a old concept in c# programming.both
java and c# uses this concept.a namespace is act like
a 'wrapper' around one or many elements which gives
them uniqueness.

in some way these codes will help you very much if you need
to know file extension.
method below returns true if extension are any of the following -

In wordpress there are some definite ways to add scripts and styles
in your custom plugin.If you don't follow these rules you might
encounter numerous problems specially related with jquery.

It's a professional logic to use the databaseOwner
and objectQualifier values when creating tables
else you will not be able to identify the tables
in databases with ease and gain other benefits of it.

n your asp.net application/website you can count
how many visitors are browsing your website easily.
for this add a Global.asax file in your website.
then add the following codes in that file -