Reading MFT

Just looking at your code ...
private Dictionary<UInt64, FileNameAndFrn> directories_ = newDictionary<ulong, FileNameAndFrn> ( );
publicDictionary<UInt64, FileNameAndFrn> directories
{
    get { return directories; }   // <== here it is
    set { directories = value; }
}

I think it should read
private Dictionary<UInt64, FileNameAndFrn> directories_ = newDictionary<ulong, FileNameAndFrn> ( );
publicDictionary<UInt64, FileNameAndFrn> directories
{
    get { return directories_; }   // <== here it is
    set { directories_ = value; }
}

I've never gotten this error but who knows what would happen when you use directories instead of directories_ in the get and set functions.