The fundamental parts of a dataset are exposed to you through standard programming constructs such as properties and collections. For example:
The DataSet class includes the Tables collection of data tables and the Relations collection of DataRelation objects.
The DataTable class includes the Rows collection of table rows, the Columns collection of data columns, and the ChildRelations and ParentRelations collections of data relations.
The DataRow class includes the RowState property, whose values indicate whether and how the row has been changed since the data table was first loaded from the database. Possible values for the RowState property include Deleted, Modified, New, and Unchanged.