It appers that System.Windows.Forms.Application.UserAppDataPath changes
drastically when the application is installed via "click once"; (as opposed
to setup or good old file copy). I'm looking for a place to put user data
that spans versions. In the non-click once scheme, all I had to do was back
up one level.

Is System.IO.IsolatedStorage.IsolatedStorageFile the preferred approach? Or
is there some other mechinism for storing application settings for a user?

Thanks for the ideas...Chuck

Isolated storage has the same problem. So my guess is that the best approach
is to call SHGetFolderPath with CSIDL_APPDATA and then create your directory.

How to reinforce types without composition/inheritance
Seeking Advice for Starting a Windows Service
Invoke or BeginInvoke cannot be called on a control until the window handle has been created.
Test a XAML in XP, service pack 2
FTPWEBRequest always return error 550