Hello
I am using Sample code from Wrox's ASP.NET Website Programming Problem - Design - Solution

I notice that in Class Libraries there are:
Accounts.Business.vbproj and Accounts.Business.vbproj.user.
These names don't match and Accounts.Business.vbproj.user is File Type:Visual Basic Project User Options while Accounts.Business.vbproj is file Type: Visual Basic .NET Project.

How to make these different and what is Visual Basic Project User Options?

The *.User file is a file that Visual Studio uses to store your local user settings specific to the project. I'm not sure what all gets stored in there, but that's what the file is used for. You could delete that file and when you open up visual studio again, it will recreate it. What windows explorer declares the file types to be might have little to do with what they are used for.