(ASP.NET C#) Controls.Add DropDownList แล้วเว้นบรรทัดไม่ได้ ..............!!?

int i;
        Label lblNum,lblBr;
        TextBox txtQuan, txtUnit, txtAmount;
        DropDownList DDLDetailList;
        for (i = 1; i <= Convert.ToInt32(this.ddlNum.SelectedItem.Value); i++)
        {
            lblBr = new Label();
            lblBr.Text = "<br /><br /><br />";

            txtQuan = new TextBox();
            txtQuan.ID = "Quan" + i;
            txtQuan.Width = 20;

            DDLDetailList = new DropDownList();
            DDLDetailList.ID = "Detail" + i;

            lblNum = new Label();
            lblNum.Text = Convert.ToString(i);

            txtUnit = new TextBox();
            txtUnit.ID = "Unit" + i;

            txtAmount = new TextBox();
            txtAmount.ID = "Amoumt" + i;
            
            this.Panel1.Controls.Add(lblNum);
            this.Panel1.Controls.Add(lblBr);

            this.Panel2.Controls.Add(lblBr);
            this.Panel2.Controls.Add(DDLDetailList);

            this.Panel3.Controls.Add(txtQuan);
            this.Panel3.Controls.Add(lblBr);

            this.Panel5.Controls.Add(txtUnit);
            this.Panel5.Controls.Add(lblBr);

            this.Panel6.Controls.Add(txtAmount);
            this.Panel6.Controls.Add(lblBr);