asp.net程序版权系列问题（一） 如何加入试用期限制？

Question

http://expert.csdn.net/Expert/topic/2290/2290401.xml?temp=.5321161

Answer 1

seeASP.NET Server Control Licensing
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaspp/html/aspnetcontrollicensing.asporDeveloping Microsoft ASP.NET Server Controls and Components (ISBN 0-7356-1582-9) by Nikhil Kothari and Vandana Datye 
http://www.microsoft.com/mspress/books/5728.asp

Answer 2

http://expert.csdn.net/Expert/topic/1984/1984613.xml?temp=.5733454

Answer 3

use wise or install shield , I t's easy to do