Want to create a security application

Iam suppose to create a desktop application in c#.net

The created appliation had to run only in one system.....

HOw to make this possible.....

Check out Singleton design pattern..

still problem is not clear..

do you want to restrict the application to run only in one system to prevent misuse of application..

If yes, then at time of application startup mark entry in database or using web service .

set counter how many systems are using application.

This way you can restrict application to one system.