Another significant information I wanted to share with you is, Orcas December CTP is going to replace ADO.NET with LINQ. About LINQ,
The LINQ Project is a codename for a set of extensions to the .NET Framework that encompass language-integrated query, set, and transform operations. It extends C# and Visual Basic with native language syntax for queries and provides class libraries to take advantage of these capabilities.
Read more about LINQ here
Read more about Orcas December CTP information here