Support for LocalDB Included in .NET Framework 4
This week it was announced that Microsoft will be including support for LocalDB in the .NET Framework 4. LocalDB is the free version of SQL Server "Denali" that provides developers with access to the majority of the server's API, without the overhead that the management aspects of the API brings along.
Additionally, Update 4.0.2 was released for the .NET runtime, and features several SQL Server connectivity improvements including support for AlwaysOn and LocalDB in the SQLClient. This update enables developers to access LocalDB instances from Visual Studio, providing them with the tools needed to create and test their apps using a basic, maintainable SQL database.
SQL Server Express, which is a limited version of SQL Server, has been available for developers to download and use for free. The problem with SQL Express is that it has installation and administration overhead itself, and in order to keep up with the latest SQL Server editions, the program continued to grow and become more complicated. LocalDB is Microsoft's solution to those problems.
Read the original article here.