Define different namespaces in ado.net for data provide

System.data:-Its contains some basic objects for relational data just like dataset,datatable and data realtion.

System.Data.OleDB:-Its main function is to help in connecting with data with OLE-DB provider.

System.Data.SqlClient:-Its main function is to help in connecting with TDS interface and provide better peformance.

System.XML:-Its helps in basic objects method to create, read, store, write, and manipulate XML documents