How can I make my application have a 30 day trial period [duplicate]

问题

This question already has an answer here:

• Create an application that will expire after a trial period [duplicate] 5 answers

how to create trial period setup file for 30 days of my c# windows application?

回答1:

Making C# application a 30 day trial version

http://www.dotnetspider.com/forum/130150-Making-C-application-day-trial-version.aspx

How to add more functionality in setup file? - C#

http://www.daniweb.com/forums/thread226490.html

回答2:

One possible solution is to use the registry and write there in some key the installation date. This step is done in the installation time/ first time the application is in use. Then periodically check the current date against the installation date.

You can take also these references:

1. http://www.codeproject.com/KB/cs/Trial_Maker.aspx

2. http://trial.qarchive.org/

3. Using .Net built-in classes

来源：https://stackoverflow.com/questions/3625825/how-can-i-make-my-application-have-a-30-day-trial-period