public void GetData(byte[] buffer, int offset, int length)
        {
            if (IsStreamed)
            {
                stream.Seek((long)size + (long)this.id * (long)size, SeekOrigin.Begin);
                stream.Read(buffer, offset, Math.Min(size, length));
            }
        }

        static void Main(string[] args)
        {
            var file = new CompoundFile(@"cf_test6.bin");
            var cfStream = file.RootStorage.TryGetStorage("Layer2").TryGetStream("ids");

            // ArgumentOutOfRangeException
            var r = new StreamReader(cfStream.AsIOStream());
            // If replace by this code line, no exception
            //var r = new StreamReader(new MemoryStream(cfStream.GetData()));
            int count = 0;
            while (r.ReadLine() != null)
            {
                count++;
            }
            Console.WriteLine(count);

            Console.ReadLine();
        }

private void LoadDirectories()
{
	List<Sector> directoryChain
		= GetSectorChain(header.FirstDirectorySectorID, SectorType.Normal);

	if (header.FirstDirectorySectorID == Sector.ENDOFCHAIN)
		header.FirstDirectorySectorID = directoryChain[0].Id;

	StreamView dirReader
		= new StreamView(directoryChain, GetSectorSize(), directoryChain.Count * GetSectorSize(), sourceStream);


	while (dirReader.Position < directoryChain.Count * GetSectorSize())
	{
		IDirectoryEntry de
		= DirectoryEntry.New(String.Empty, StgType.StgInvalid, directoryEntries);

		//We are not inserting dirs. Do not use 'InsertNewDirectoryEntry'
		de.Read(dirReader);
                // We should check de.StartSetc here
                if(de.StartSetc > sectors.Count)
                {
                        throw new CFException("Compound File is invalid");    
                }
	}
}