DateSet.AcceptChanges() distributes this method to all of the DataRow
and DataTable objects it might be holding. If you want to apply
AcceptChanges() to all objects within a dataset and avoid writing code
for each object, just call AcceptChanges() on the DataSet.
I use InsertGroupByInto(DataSet.Table["TableA"]) in class of DataSetHelper.
Then I Call DataSet.Table["TableA"].AcceptChanges() ,it same to call
DataSet.AcceptChanges() .