Adding rows to a table?

Hi

I try to add three rows to a table

private void BuildMyLeaveDetailGrids()
    {
        TableRow tr = new TableRow();
        TableCell tc = new TableCell();
        tc.Text = "test";

        tr.Cells.Add(tc);

        for (int i = 0; i < 3; i++)
        {
            TableMyLeaveDetails.Rows.Add(tr);
        }

    }

but it only adds one when I look at my html page?

Thanks