iTextSharp.text.pdf.AcroFields.RevisionStream.Read C# (CSharp) Метод

            public override int Read(byte[] b, int off, int len) {
                if (b == null) {
                    throw new ArgumentNullException();
                } else if ((off < 0) || (off > b.Length) || (len < 0) ||
                ((off + len) > b.Length) || ((off + len) < 0)) {
                    throw new ArgumentOutOfRangeException();
                } else if (len == 0) {
                    return 0;
                }
                if (rangePosition >= length) {
                    Close();
                    return -1;
                }
                int elen = Math.Min(len, length - rangePosition);
                raf.ReadFully(b, off, elen);
                rangePosition += elen;
                return elen;
            }