说明：  This training kit is designed for developers who plan to take Microsoft Certified Technical Specialist (MCTS) exam 70-561, as well as for developers who need to know how to create data-driven applications using the ADO.NET and Microsoft .NET Framework 3.5. We assume that before you begin using this kit, you have a working knowledge of the .NET Framework, databases, and Microsoft Visual Basic or C#.inclode Source code