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

        protected void CloseIt()
        {
            for (int k = 0; k < readers.Count; ++k) {
                readers[k].RemoveFields();
            }
            for (int r = 0; r < readers.Count; ++r) {
                PdfReader reader = readers[r];
                for (int page = 1; page <= reader.NumberOfPages; ++page) {
                    pageRefs.Add(GetNewReference(reader.GetPageOrigRef(page)));
                    pageDics.Add(reader.GetPageN(page));
                }
            }
            MergeFields();
            CreateAcroForms();
            for (int r = 0; r < readers.Count; ++r) {
                    PdfReader reader = readers[r];
                    for (int page = 1; page <= reader.NumberOfPages; ++page) {
                        PdfDictionary dic = reader.GetPageN(page);
                        PdfIndirectReference pageRef = GetNewReference(reader.GetPageOrigRef(page));
                        PdfIndirectReference parent = root.AddPageRef(pageRef);
                        dic.Put(PdfName.PARENT, parent);
                        Propagate(dic, pageRef, false);
                    }
            }
            foreach (KeyValuePair<PdfReader, IntHashtable> entry in readers2intrefs) {
                PdfReader reader = entry.Key;
                try {
                    file = reader.SafeFile;
                    file.ReOpen();
                    IntHashtable t = entry.Value;
                    int[] keys = t.ToOrderedKeys();
                    for (int k = 0; k < keys.Length; ++k) {
                        PRIndirectReference refi = new PRIndirectReference(reader, keys[k]);
                        AddToBody(PdfReader.GetPdfObjectRelease(refi), t[keys[k]]);
                    }
                }
                finally {
                    try {
                        file.Close();
                        reader.Close();
                    }
                    catch  {
                        // empty on purpose
                    }
                }
            }
            pdf.Close();
        }