From the man himself, Eric Gunnerson:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dncscol/html/csharp05152003.asp

You probably want to get the Primary Interop Assemblies from Microsoft to work with Office. The article has the link.

>Hi,
>
>I'm going to be working on a project soon in which one of the requirements will be to do some MS Office automation. I've done this many times using VB6 - but I want this to me my first C# app. Can anyone point me to any resources for Office automation using C#?
>
>Thanks in advance,