The concept of inheritance is one that is at the root of all object-oriented programming. All the pages in our site are currently "inheriting" from the System.Web.UI.Page class that is part of the ASP.NET framework—but they don't have to. One concept that you will find in many applications is the use of a "base" class. The idea behind this is that if you have all of your classes (or pages in our case) inheriting from a single class of your own, then you have given yourself a shared place for many things to reside. Just like in the idea behind the Master Page, we can do this ourselves. Create a new class in your app_code folder, calling it SimpleCMSBasePage.vb. It will start off simple and empty like this:
Imports Microsoft.VisualBasic Public Class SimpleCMSBasePage End Class
What you can do now is set it up so that it inherits from System.Web.UI.Page. (You'll come to know the reason in a while.) To do this, change the Class definitions to look like this:
Imports Microsoft.VisualBasic...