Dataset maintains the rowstate of each row with in a table. As a dataset is loaded, it's rowstate version is unchanged. Whenever there is a modification in a paricular row with in a datatable, dataset changes the rowversion as modified.

 

The DataAdapter.Update() method calls UPDATE, INSERT, or DELETE statements, as the case may be to update, insert, or delete a row in a DataSet.

The DataSet.Acceptchanges() method reflects all the changes made to the row since the last time the AcceptChanges() method was called.