[BrighterLater]

Supposing I was designing a Class structure that dealt with projects and tasks. And supposining there were groupings of projects, lets call them project_lists. Then is it likely that I would have the following Classes:
Projects
Project
Tasks
Task

and as Project_lists would probably have the same methods and properties as Projects, would I need a separate Class for them?

Thanks - Mike

[chris0]

no,

you only need 2 classes
Project
Task

and then in the code have an array of projects and an array of tasks