In this article I will guide you creating a File Explorer in Silverlight 4. This step-by-step guide will help yoou understanding the API call and how to access local files, folders and drives using the Silverlight 4 COM APIs.
How to serialize binary data to IsolatedStorage in a Silverlight client when there is no BinaryFormatter in Silverlight? Why not with sharpSerializer? - An open source XML and binary serializer for .NET and Silverlight