如何将ASP.NET查询字符串值传递给我的silverlight 2控件？

<form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
    <asp:Silverlight ID="Xaml1" runat="server" Source="~/ClientBin/SilverlightApplication.xap" MinimumVersion="2.0.31005.0" Width="100%" Height="100%" />
</form>

protected void Page_Load(object sender, EventArgs e)
{
    var initParams = new Dictionary<string, string>();
    foreach (string key in Request.QueryString.Keys)
    {
        initParams.Add(key, Request.QueryString[key]);
    }
    Xaml1.InitParameters = initParams;
}

public MainPage()
{
    InitializeComponent();
    var initParams = Application.Current.Host.InitParams;
    if (initParams.ContainsKey("paramName"))
    {
        string paramValue = initParams["paramName"];
        // 使用参数值执行相应操作
    }
}