I have recently upgraded an ASP.NET project (created in VB.NET 2003) to Visual Studio 2005.

In it, I am referencing a cascading style sheet (Styles.css).

In the design view, the formatting specified in my style sheet is applied. But when I build and debug by project, the style sheet is no longer applied. Why is this?

I have tried rebuilding my project, stopping and starting IIS but all to no avail...