Where to Store the Protection Trial Info for Software Protection Purpose

Question

It might be duplicate with other questions, but I swear that I googled a lot and search at StackOverflow.com a lot, and I cannot find the answer to my question:

In a C#.

Answer 1

Can you require that users using the trial be connected to the internet? If so just have the trial version contact a server during startup and you can check all sorts of things. you don't have to worry about storing stuff on the users computer or them tampering with the data or the system time.