Hello Genius

I want develop a software which user can download from my website and that software must me use less after specified period, Can any one guide me in right direction what's the logic I have implement to accomplish this task.

Thanks

and that software must me use less after specified period

I'm not a native English speaking person, so please explain what you mean by the above sentence.

I'm not a native English speaking person, so please explain what you mean by the above sentence.

I am and I need it explained :)

Actually I have to create a software on C#.So that user can able to use for limited period.

For example when we download some software from internet and that will expire after a limited period of trial.

Ho, now I see!
But "use less" means: "do not use so often"
"useless" means "out of use" or "cannot be used any more"

Useless mean is demo version

Did you check the link in the post of gulbano?
Seems very good.