i want to remove data from gridview after data is stored in other table.. By my code only first row data is remove from gridview other is avilable ...

void gridshw2()
    {
        cn.Open();
        s = "Select * from persn_info";
        try
        {
            da = new OleDbDataAdapter(s, cn);
            DataSet ds = new DataSet();
            da.Fill(ds, "set");
            dataGridView2.DataSource = ds;
            dataGridView2.DataMember = "set";

            s = "select sub_no from paymnt_info";
            cm = new OleDbCommand(s, cn);
            rd = cm.ExecuteReader();
            if (rd.Read())
            {

                    if (rd["sub_no"].ToString() == dataGridView2.Rows[].Cells[0].Value.ToString())
                    {
                        dataGridView2.Rows.RemoveAt(0);
                    }

            }
        }
        catch (Exception ea)
        {
            MessageBox.Show(ea.Message);
        }
        finally {
            cn.Close();
        }
    }