iTextSharp.text.pdf.PdfReaderInstance.GetImportedPage C# (CSharp) Метод

        internal PdfImportedPage GetImportedPage(int pageNumber)
        {
            if (!reader.IsOpenedWithFullPermissions)
                throw new ArgumentException(MessageLocalization.GetComposedMessage("pdfreader.not.opened.with.owner.password"));
            if (pageNumber < 1 || pageNumber > reader.NumberOfPages)
                throw new ArgumentException(MessageLocalization.GetComposedMessage("invalid.page.number.1", pageNumber));
            PdfImportedPage pageT;
            if (!importedPages.TryGetValue(pageNumber, out pageT)) {
                pageT = new PdfImportedPage(this, writer, pageNumber);
                importedPages[pageNumber] = pageT;
            }
            return pageT;
        }