How to Modify a word document in ASP.net if MS Word is not installed on Server?

Question

HI,

I am currently analysing the scenario to modify word document if MS word in not installed on the server.

Actually I was thinking to modify my word document using Microsoft.Office.Interop.Word but when i came across a thread that MS Office must be installed on server then I started thinking for some alternate way to modify my word documents.

Can any one help me out how to handle this scenario if I do not have word Installed on server and I want to modify word document.

Thanks,
Qasim