类似的问题有很多答案>
如何将pdf转换为doc in .net [ ^ ]

Similar question with many answers
how to convert the pdf to doc in .net[^]

您必须自己使用第三方程序或编写功能（如果您没有专业知识，那就太傻了），您可以尝试使用Google搜索例如：

http://pdf2word.en.softonic.com / [ ^ ]

You either have to use a 3rd party program or write the functionality yourself (which is silly if you don't have the expertise), you can try using Google to search for example :
http://pdf2word.en.softonic.com/[^]