PDF Focus .Net is a cross-platform .NET library that allows your applications to convert PDF documents to everything: DOCX, RTF, HTML, XML, Excel, images and text documents with many options and functions. After adding a reference to "SautinSoft.PdfFocus.dll" and entering 3-4 lines of C#, you can use the API in your applications:
PDF 1.0-1.7, PDF/A.
DOCX, RTF, Text, HTML, JPEG, PNG, BMP, TIFF, MultipageTiff, GIF, Excel, XML.