DataList绑定数据到泛型类(Dictionary)

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections.Generic;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Dictionary<string, A> d = new Dictionary<string, A>();
d.Add("aa", new A("1", "xx"));
d.Add("bb", new A("2", "yy"));
d.Add("cc", new A("3", "zz"));

DataList1.DataSource = d;
DataList1.DataBind();
}
}
}

public class A
{
private string m_PKID;
private string m_Type;

public string PKID
{
get { return m_PKID; }
set { m_PKID = value; }
}

public string Type
{
get { return m_Type; }
set { m_Type = value; }
}

public A() { }

public A(string pkid, string type)
{
this.m_PKID = pkid;
this.m_Type = type;
}
}

<asp:DataList ID="DataList1" runat="server" OnItemDataBound="DataList1_ItemDataBound">
<ItemTemplate>
<%#( (System.Collections.Generic.KeyValuePair<string, A>)(Container.DataItem)).Key %>
<%#( ((System.Collections.Generic.KeyValuePair<string, A>)(Container.DataItem)).Value as A).PKID %>
<%#( ((System.Collections.Generic.KeyValuePair<string, A>)(Container.DataItem)).Value as A).Type %>
</ItemTemplate>
</asp:DataList>