Why is FileInfo showing an extra file extension?

Question

I have been having problems with creating a download list of files for a downloader and was getting unexplained \"File Does Not Exist\" returns. My .avi files were returning fo

Answer 1

Windows has a "feature" that hides file extensions for known file types. Always turn that off or you'll find yourself creating problems like this.

Answer 2

Have you checked that "Tools > Folder Options > View > Hide extensions for known file types" is unchecked?

The option should be in (more or less) the same place on Windows Server 2008, I'm answering from home so I only have XP Pro to go on ;)

Obvious I know, but it sometimes is the obvious answer that we overlook.

Just to add - there's no option to show the extension in a separate column.