article manager using asp.net?

I am developing a website using ASP.net,C# and MS SQl 2008. I am using visual stuido 2010.
Now i want to have article publishing mechanism.the users of the site should be role based sytem. i am looking for module or widget to publish the article so that the article could be Pending,Hidden, or published status based on the user given permision. administrator users can publish articles Editor users will approve articles, trusted write will publish article without needed for approving. normal users will publish article but will be pending status until editor approves it. i want to make a feature like this in my website. please for word me if u have any ready made code or tools?
thanks