You have a problem on paypal button? When you use the script given from paypal for article, the button gets visible but when clicked on it defines no action..The solution is simple...

You have to change the Text Filters setting to "No Filters" for all users in global configuration and must make the text editors to none after that add the paypal code button script. It works fine...

Problem Solved.

with Cheers,
Ultimatecine.com

if you want to prevent running multiple instance
of the same c# application then check the
following lines.It's sometime necessary to prevent
running multiple instances of the same application.

you can use online paypal buy button in your page
for receiving online paypal payment.when users click
this buy button they will enter in payment page
for payment.

Asp.net caching helps you to create high performance applications.
you can cache objects like DataSets,or your created objects.you can
also do page level caching if you used user controls in the page
if your aspx page includes lots of work.

to display the help and let the users easily get help
whenever they need it you can call the Help.ShowHelp
method in your form.

how to use private browsing?

If you don't want to save cookies and histories for certain activities
and for security purposes while browsing then Press CTRL + Shift + N,
which will launch new private browsing for Chrome, CTRL + Shift + P will
do it for Firefox and IE.

in coding giving proper names to methods,classes,controls,
variables,others is neccessary and good programming practice.
think that a method name-show button click.