you can put application specific settings in the
appSettings section of your app.config file in your
c# windows form application.you can access,edit,update
those settings.I show you how -

when you build a software make sure that you built it by object oriented way
and you organized your files in folders as following way -

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.

It's nice to show cool gradient color as a
background color of the form in c#.net desktop
application.you can set different colors.

Gravatar.com is used to store one's avatar image according to email.
then if you comment in any application using your that email address
where gravatar image has been programmed then your avatar image will
be displayed in the application.