Manage Licenses for my c# application

Hi

Does anybody knows how to implement LicenseManager in a windows.forms app?

I have found ways of testing the license in c#

but i have not found any ways of how to add the license to the app for a demo version and later how to add a final license using an *.lic file (xml)

Im trying to use OpenLicense 200a but i just cannot add the license file (dont know how)

Thanks in advance for your replies