Extracting/Inserting Outlook contacts?

Hi! I was wondering if anyone here knows howto extract the contacts I have in my Outlook, and do something with them (I'm going to insert them into a database), and then later on I should be able to insert contacts to Outlook, if I see that I miss a contact.. Kind of synchronizing the database contacts with my Outlook contacts. So basically what I am wondering is: How can I extract and insert contacts from Outlook? Can it be done by reading just a simple file, or do I need to use the Outlook 11.0 COM object with the .NET framework? By the way, when doing this I get a permission issue, where the system asks me weather it's okay for to access Outlook for a temporary time space .. However, when I'm using the same code via asp.net I just get a permission denied page. How can I allow asp.net account to acces Outlook, on OTHER computers? Greatful for any help I can get.