set trail validity in windows application with C#

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How to set like 15 days validity in winform application so that after 15 days that exe cant be executed..

Posted 10-Aug-10 8:59am

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Sandeep Mewara · Answer 1 · 2010-08-10T09:07:00

There are different ways to achieve this
1) encrypted license files that contains the expiry dates etc.
2) encrypted license keys held in the registry
3) challenge/response mechanism which require an internet connection
4) probably others.......
Try: License Key Generation[^]
or: How can I create a Product Key for my C# App[^]
or: c# Licensing[^]
Also,
Cryptography 101 for the .NET Framework[^]