C# How can I create a simple time based trial version of my software? [duplicate]

Answer 1

I would use .NET Reactor over at www.eziriz.com

Answer 2

My choice would be to store the date of the install (encrypted with a key) in the registry or config file. Look at this each time the application starts.

You can protect your app.config file using something like the RsaProtectedConfigurationProvider .

Obviously if they decompile the source they'll find the key in it, obfuscating might help this a bit, or using public/private key but that is probably an overkill for what you need.

Answer 3

To get the present 'Time' in C you have to use the header file stdlib.h and the function:

system("echo %time%");

Program:

main(){
  system("echo %time%");
  getch();
}