iTextSharp.text.pdf.AcroFields.ExtractRevision C# (CSharp) 메소드

        public Stream ExtractRevision(String field) {
            FindSignatureNames();
            field = GetTranslatedFieldName(field);
            if (!sigNames.ContainsKey(field))
                return null;
            int length = ((int[])sigNames[field])[0];
            RandomAccessFileOrArray raf = reader.SafeFile;
            raf.ReOpen();
            raf.Seek(0);
            return new RevisionStream(raf, length);
        }