من با modern_amin موافقم.
ببین از این مهملات چیزی حالیت میشه؟! به نظرم اومد ممکنه به درد بخوره ولی راستش خودم درست نفهمیدم...
It's not exactly related to cracking it, but it's worth noting that if this is an app that can be used internationally, it'll show as being 'expired' for many users before they've even had a chance to try it at all. The values returned by DateTime reflect the local users culture, so DateTime.Now.Year returns 1431 for Arabic cultures and 2553 for the Thai culture for instance. Months can similarly differ, so you shouldn't hardcode values for them without checking the culture first.
You can get round this by using the InvariantCulture each time ,e.g.
DateTime.Now.Year.ToString(System.Globalization.Cu ltureInfo.InvariantCulture);