Get User Picture using Lync (Skye for Business) SDK

public class UserEntity
{
   public BitmapImage UserImage { get; set; }
}

public partial class MainPage : UserControl
{
  List<UserEntity> allUsers = new List<UserEntity>();
  LyncClient client;
    public MainPage()
  {
    InitializeComponent();
    client = LyncClient.GetClient();

    UserEntity userObjet = new UserEntity();

    if (client != null)
    {
       ContactManager cManager = client.ContactManager;
       if (cManager != null)
       {
         Contact contact = cManager.GetContactByUri("[email protected]");
         if (contact != null)
         {
           List<ContactInformationType> ciList = new List<ContactInformationType>();
           ciList.Add(ContactInformationType.Photo);
           IDictionary<ContactInformationType, object> dic = null;
           dic = contact.GetContactInformation(ciList);
           if (dic != null)
           {
             Stream photoStream = dic[ContactInformationType.Photo] as Stream;
             if (photoStream != null)
             {
               BitmapImage userImageBitMap = new BitmapImage();
               userImageBitMap.SetSource(photoStream);
               userObjet.UserImage = userImageBitMap;
             }
           }
         }
      }
    }
    allUsers.Add(userObjet);
  if (allUsers != null && allUsers.Count > 0)
         {
           userImage.ItemsSource = allUsers;
  }
  }

<Image Name="userImage" Source="{Binding Path=UserImage}" Margin="2,2,2,2" Height="40" Width="40"></Image>