软件试用期程序，对共享软件很有用的哦！-software probation procedures, right-sharing software very useful!

试用期30天,时间,期限设置, 日期限制,用c#.net 开发,源码 分享一下-30-day trial period, time, period settings, date restrictions, with c#. Net development, source code to share

C#开发的商业软件，有时候需要加个试用期，在试用期内限制部分功能，试用期结束则无法使用。本源码既解决此问题-Commercial software development in C#, and sometimes need to add a trial period, to limit some of the features in the trial period, you can not use the end of the trial period. The source resolve