how to binding data into infragastics's xamGrid using Linq?

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C#

LINQ

Silverlight

data-binding

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I have an xamGrid of infragastics but i have no idea binding data using linq. The project is a silverlight application. my connected to my WCF data service based on VatTu.edmx (ADO.NET Entity Data Model) In xamGrid, i create 2 columns with headertext:ID and Name In MainPage.xaml.cs:

namespace SilverlightApplication12
{
public partial class MainPage : UserControl
{
    private VattuEntities db;
    private DataServiceCollection<VatTu> vts;
    public MainPage()
    {
        db = new VattuEntities(new Uri("http://localhost:43664/VatTuService.svc"));
        InitializeComponent();
    }

    private void UserControl_Loaded(object sender, RoutedEventArgs e)
    {
        var q= from vt in db.VatTus select vt;
        vts.LoadAsync(q);
        grid.itemsource=vts;  
    }       
}}

"vt" have 2 properties: ID and name. But the page always load 100% and never show my designed page. Please help me. Sorry for my bad English.