These two videos show you how to work with the file system in Visual Basic .NET, C#, and Visual Studio 2010. This video shows you how to browse drives, folders, and files in a Windows Forms application (though it would work exactly the same in an ASP.NET Web application). This video can help you prepare for the 70-536, 70-515, and 70-511 MCTS or MCPD exams. A C# version of this video is also available.
First, the Visual Basic .NET version:
Now, the C# version: