Hi Katelva, Silverlight is a client-side technology which runs on the user's browser. so, you can't connect with any database directly from Silverlight. but you can create the service (i.e: ASMX webservice, WCF, ADO.NET Data Service, Java or Webservice that follows WS Basic-Profile 1.1 ) and you can connect with that web service. there are a few samples how to do CRUD (Create, Retrieve, Update, Delete) operation in Silverlight in my blog. you may want to read them.
Thanks and Regards, Michael Sync ( Blog: http://michaelsync.net)