How to convert PDF document to Word document?

//Creates a new Word document.
WordDocument m_wordDocument = new WordDocument();
 
//Adds new section to the document.
IWSection section = m_wordDocument.AddSection();
 
//Sets the page margins to zero.
section.PageSetup.Margins.All = 0;
 
//Adds new paragraph to the section.
IWParagraph firstParagraph = section.AddParagraph();
 
SizeF defaultPageSize = new SizeF(m_wordDocument.LastSection.PageSetup.PageSize.Width, m_wordDocument.LastSection.PageSetup.PageSize.Height);
 
//Loads the PDF document from the given file path.
using (PdfLoadedDocument m_loadedDocument = new PdfLoadedDocument(m_filePath))
{
        for (int i = 0; I < m_loadedDocument.Pages.Count ; i++)
        {
              //Exports the PDF document page as image with the given size.
              using (Image image = m_loadedDocument.ExportAsImage(i, defaultPageSize,false))
              {
                   //Adds image to the paragraph
                   IWPicture picture = firstParagraph.AppendPicture(image);
 
                  //Sets width and height for the image.
                  picture.Width = image.Width;
                  picture.Height = image.Height;
              }
         }
};
 
//Saves the Word document
m_wordDocument.Save("Save.docx");
 
//Close the document.
m_wordDocument.Dispose();