How to convert a word file(docx) to pdf using asp.net c#

Question

How to convert a word file(docx) to pdf using asp.net c#.Please suggest me a free Api for this

i tried with

Microsoft.Office.Interop.Word

but failed some error is coming "COM class factory for component with CLSID {000209FF-0000-0000-C000-000000000046} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))."

This will solved by installing word2007 addiin "saveaspdf".but problem is that i cant install this on server.

 

so please help me with a another option to convert word file to pdf with any free api Refference (dll).with out using Microsoft.Office.Interop.Word.