The .NET Framework replaced a series of data access APIs with ADO.NET. ADO.NET 2.0 brought improved access to third-party database formats along with support for asynchronous and batch updates to databases. In 2007, Microsoft introduced a new version of ADO.NET designed to support Language-Integrated Query (LINQ), a set of new programming language features coming in VB.NET and C# that allow developers to express database queries directly in the programming language instead of having to mix SQL syntax into their programs.
2008 will bring new data access technologies on top of the ADO.NET API. These include the ADO.NET Entity Framework, which enables developers to use entity data modeling to simplify maintenance and improve portability of data access code, and ADO.NET Data Services, which makes data from SQL Server, and potentially other databases, accessible via standard Hypertext Transfer Protocol requests using data formats common with the increasingly popular REST style of Web service.
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