Library to read MANY document-file formats?
<p>I am developing an ASP.NET in which I have a "file upload" control. So, User may upload files of any format like .doc, .pdf, .docx, .txt, .rtf, .ppt, .odt etc.</p>

<p>The program must be able read data from any file of these formats. I dont want to use different third party libraries for each of these file formats. I want one common solution to read all these files.</p>
