An FYI item for those who may be having an issue with the Caching Objects example (especially those new to VWD). The CodeBehind page requires that "using System.Collections" be added to the declarations at the top of the page in order for the "ArrayList" data type to function properly.
VWD was very helpful in finding this . . . I just had to right click on the ArrayList text (since it was underlined as an error), and VWD suggested the proper solution within the context menu.
Many thanks to those who put this tutorial together. I have been working my way though the ASP.NET one and have found it very useful. Looking forward to going through the others as well.
Brian
That Brian, That great TIP 
