In order to gain control on the level that you want, you should probably probe one directory at a time, instead of a whole tree. The following method populates the given IList<string>
with all files found in the directory tree, except those where the user doesn’t have access:
// using System.Linq
private static void AddFiles(string path, IList<string> files)
{
try
{
Directory.GetFiles(path)
.ToList()
.ForEach(s => files.Add(s));
Directory.GetDirectories(path)
.ToList()
.ForEach(s => AddFiles(s, files));
}
catch (UnauthorizedAccessException ex)
{
// ok, so we are not allowed to dig into that directory. Move on.
}
}