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OleDbConnection con = new OleDbConnection(
            @"Provider=Microsoft.Jet.OLEDB.4.0;
            Data Source= db1.mdb");
            con.Open();

            string strSQL = "SELECT [SP Required], [Total SP], [Isro Exp], [Csro Exp] FROM Exptabelle";

            OleDbCommand cmd = new OleDbCommand(strSQL, con);
            OleDbDataReader dr = cmd.ExecuteReader();

            while (dr.Read())
            {
                //richTextBox5.Text = dr.ToString() +"\n"+ dr.FieldCount.ToString() + "\n";
            }
            dr.Close();
            con.Close();					

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string tester = db1DataSet.Exptabelle[20].Csro_Exp;
            MessageBox.Show(tester);