Hi,
Can you please brief on your requirement like...
1. What is the source of the 4 lists?
2. Should the changes be stored in csv format? What data?
3. How often the check needs to be done?
I'm a 14+ years experienced professional developing application for windows and web platform using technologies such as C#, VB.NET, ASP.NET MVC, Web API, Sql Server, AngularJS, Angular Strap, Bootstrap, CSS/CSS3, jQuery, etc..,
Please ping me a if there is anything you would like to discuss with me.
Thanks,
Hemant.