public DataSet CreateCmdsAndUpdate(DataSet dataSet, string connectionString, string queryString) { using (OleDbConnection connection = new OleDbConnection(connectionString)) { OleDbDataAdapter adapter = new OleDbDataAdapter(); adapter.SelectCommand = new OleDbCommand(queryString, connection); OleDbCommandBuilder builder = new OleDbCommandBuilder(adapter); connection.Open(); DataSet customers = new DataSet(); adapter.Fill(customers); //code to modify data in dataset here adapter.Update(customers); return customers; }}