>> No, it's not the same and I think it's related to the book.
Well, yes and no. It's related to the book since it deals with ASP.NET and LINQ. However, it's not directly related since your question doesn't deal with any of the text, exercises or code examples directly. If you post in the General category, you'll attract more visitors and are likely to get an answer faster.
Anyway, to discover the type, hover your mouse over Dim or users (I forgot where it shows up for VB
). You'll likely see something like IQueryable Of user which will be the type that you need in your Dim statement.