pdf word相互转换

WORD转pdf 添加引用  using Spire.Doc;

 Document doc = new Document();
            try
            {
                doc.LoadFromFile(pdfpath);
                doc.SaveToFile(wordpath, FileFormat.PDF);
                System.Diagnostics.Process.Start(wordpath);
                doc.Close();
                doc = null;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }

pdf转word　添加引用　using Spire.Pdf;

  PdfDocument doc = new PdfDocument();
            try
            {
                doc.LoadFromFile(pdfpath);
                doc.SaveToFile(wordpath, FileFormat.DOC);
                System.Diagnostics.Process.Start(wordpath);
                doc.Close();
                doc = null;
            }
            catch (Exception ex){
                MessageBox.Show(ex.ToString());
            }