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III. API Quick Reference > 34. The System.Data Namespace

Chapter 34. The System.Data Namespace

The System.Data namespace represents the core of ADO.NET. It contains the fundamental data container classes such as DataSet. Every DataSet contains a collection of DataTable instances. Each DataTable holds a collection of DataRow objects, each of which contains the data for a single row. These data classes are independent of any ADO.NET provider. They simply store disconnected data. In addition, the DataSet also contains objects that describe structural information about your data. This structural information, which is also known as metadata, includes column-specific settings such as data type (found in DataColumn), foreign key and unique column constraints (represented by


  

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