Binding DropDownList Sorted List in asp.net

MyList:
<asp:DropDownList ID="ddlist" runat="server" DataSource='<%# mylist%>' DataTextField="value" DataValueField="key" ></asp:DropDownList>


In Code Behind:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections;

public partial class test : System.Web.UI.Page
{
protected SortedList mylist;

protected void Page_Load(object sender, EventArgs e)
{

mylist = new SortedList();
mylist.Add(1, "Pooja");
mylist.Add(2, "priya");
if (!IsPostBack)
{
ddlist.DataBind();

}


}