iTextSharp.text.pdf.security.LtvVerification.DeleteOldReferences C# (CSharp) Метод

        private static void DeleteOldReferences(PdfArray all, PdfArray toDelete)
        {
            if (all == null || toDelete == null)
                return;
            foreach (PdfObject pi in toDelete) {
                if (!pi.IsIndirect())
                    continue;
                PRIndirectReference pir = (PRIndirectReference)pi;
                for (int k = 0; k < all.Size; ++k) {
                    PdfObject po = all[k];
                    if (!po.IsIndirect())
                        continue;
                    PRIndirectReference pod = (PRIndirectReference)po;
                    if (pir.Number == pod.Number) {
                        all.Remove(k);
                        --k;
                    }
                }
            }
        }