I have a .docx file and it contains many email addresses to which i want to bulk mail. How can i read docx file through c#?
The easiest way is probably to use the Open XML SDK 2.0
Get Code Snippets for Visual Studio 2008 for some examples
And I would highly recommend downloading the Open XML SDK productivity tool which will help you understand how the Open XML files are structured, and can even help you generate source code to use with the SDK based on the structure of your documents. You can download the tool from the same page as the SDK. It's 100MB, but it's worth the download.