Folder and File permission

I'm basically building an ASP.NET MVC application that acts as a file browser. My file browser is unable to get the subdirectories of C:\Documents and Settings because the service account that my ASP.NET MVC app uses doesn't have permission to read that folder.

How can my app che开发者_如何转开发ck if my the current service account is granted to view a folder? I would like to avoid raising an exception.

Thanks