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Installing a license key for my application

Posted By:      Posted Date: October 12, 2010    Points: 0   Category :ASP.Net

Hi all i would like to install a license such that it should run for a week or so. What i am doing is i will make setup file of my application and give it to the user when the user install it on PC i would like to give a default license which can run up to a week. After  that even if he changes the date i would like to show a message as License expired

I need to know how can i give the user a default license which can run up to a week.

Can any one give me a clear idea

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