ASP.NET: How to Append Signature to Word Document

Currently I am developing a memo application for a company that each director needs to sign the word document as approved or disapprove. I have scan copy of each director as image in my DB.

The s开发者_运维技巧ignatures and date will be appended at the bottom of the doc page.

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see here is example:

http://www.c-sharpcorner.com/UploadFile/Freddy_Khalaf/add-digital-signature-to-documents09272009104159AM/add-digital-signature-to-documents.aspx