title: How to user/pass a class inside a UserControl in C#?
body: <p>I have a folder A that contains a class FirstPageControl. This class derives from another PageControl.
  I have another folder B that contains a User Control called PageUserEditor. 
  I want this control to contain a FirstPageControl. 
  The PageUserEditor will be the control that contains any logic that would be used regardless of where in the application it gets put. 
  How do I use or call the FirstPageControl in the PageUserEditor? Do I need to add in PageUserEditor all imports that are in FirstPageControl?</p>
  
  <p>(The code base is in C#)</p>