i want to remove data from gridview after data is stored in other table

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 ... my code is that:

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

            s ="select sub_no from paymnt_info";
            cm =newOleDbCommand(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();}}