publicintSplitAndSave(stringinputPath,stringoutputPath){FileInfofile=newFileInfo(inputPath);stringname=file.Name.Substring(0,file.Name.LastIndexOf("."));using(PdfReaderreader=newPdfReader(inputPath)){for(intpagenumber=1;pagenumber我想将Pdf分成多个间隔为50页的PDF。(假设如果有400页PDF，我想要8个pdf)。上面的代码将每一页拆分成一个pdf。请帮助