iTextSharp.text.pdf.PdfCopyFieldsImp.AddDocument C# (CSharp) Метод

        internal void AddDocument(PdfReader reader)
        {
            if (!reader.IsOpenedWithFullPermissions)
                throw new BadPasswordException(MessageLocalization.GetComposedMessage("pdfreader.not.opened.with.owner.password"));
            OpenDoc();
            if (readers2intrefs.ContainsKey(reader)) {
                reader = new PdfReader(reader);
            }
            else {
                if (reader.Tampered)
                    throw new DocumentException(MessageLocalization.GetComposedMessage("the.document.was.reused"));
                reader.ConsolidateNamedDestinations();
                reader.Tampered = true;
            }
            reader.ShuffleSubsetNames();
            readers2intrefs[reader] =  new IntHashtable();
            readers.Add(reader);
            int len = reader.NumberOfPages;
            IntHashtable refs = new IntHashtable();
            for (int p = 1; p <= len; ++p) {
                refs[reader.GetPageOrigRef(p).Number] = 1;
                reader.ReleasePage(p);
            }
            pages2intrefs[reader] =  refs;
            visited[reader] =  new IntHashtable();
            fields.Add(reader.AcroFields);
            UpdateCalculationOrder(reader);
        }

 /**
  * Concatenates a PDF document.
  * @param reader the PDF document
  * @throws DocumentException on error
  */
 public void AddDocument(PdfReader reader)
 {
     fc.AddDocument(reader);
 }