iTextSharp.text.pdf.PdfReader.PageRefs.ReleasePage C# (CSharp) Метод

            public void ReleasePage(int pageNum) {
                if (refsp == null)
                    return;
                --pageNum;
                if (pageNum < 0 || pageNum >= Size)
                    return;
                if (pageNum != lastPageRead)
                    return;
                lastPageRead = -1;
                reader.lastXrefPartial = refsp[pageNum];
                reader.ReleaseLastXrefPartial();
                refsp.Remove(pageNum);
            }