Directory.Exists returns true when directory is not present

Question

I am working on an application for Windows 7, and run some routine directory creation code:

string dirPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData), "MyDir");    
if (!Directory.Exists(dirPath))
   Directory.CreateDirectory(dirPath);

The problem is that the Directory.Exists line returns true, when I can't see the directory through command line and Windows Explorer. This isn't an issue when working with Windows XP. Is there something going on with Windows 7 that I'm not aware of?

EDIT: Added Path.Combine

Answer 1

Please understand that Windows Vista and Windows 7 use virtualization to protect such folders, so you need to check if myDir is in virtualstore,

C:\Users(user name)\AppData\Local\VirtualStore\ProgramData