how get outer html from a control?

hi
how get outer html from a ListBox control?
DropDownList ddlst = new DropDownList();            ddl.ID = "ddlst_1to4"; ddlst.Items.Add("1"); ddlst.Items.Add("2"); ddlst.Items.Add("3"); ddlst.Items.Add("4"); ddlst.Text = "3"; Response.Write(ddlst.????);// = <select id="ddlst_1to4"><option value="1">1</option><option value="2">2</option><option value="3"> //3</option><option value="4">4</option></select>