Getting Comfortable with ADO.NET 4.5 and SQL Server 2012
You need to familiarize yourself with the following primary .NET Framework namespaces to be able to program against SQL Server 2012:
System.Data—This is the root namespace, which contains essential data access classes, such as DataSet, DataTable, and DataRow.
System.Data.SqlClient—This namespace contains the .NET data provider for SQL Server. It includes classes specialized for SQL Server access, such as SqlConnection, SqlCommand, SqlDataAdapter, and SqlParameter.
System.Data.EntityClient ...
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