title: WP8 ContextMenu in Listbox not showing
body: <p>I got a horizontal ListBox displaying pictures. I wanted to add a ContextMenu on each item allowing the user to delete the item. But I don't know exactly where to put my ContextMenu in my ItemTemplate, I tried approximately everywhere but the ContextMenu never shows on Holding.
  Do you have an idea where to place the XAML bloc?</p>
  
  <pre><code>&lt;ListBox x:Name="PhotoListBox" Grid.Row="1" ItemsSource="{Binding}" SelectionChanged="PhotoListBox_SelectionChanged" &gt;
              &lt;ListBox.ItemsPanel&gt;
                  &lt;ItemsPanelTemplate&gt;
                      &lt;toolkit:WrapPanel 
                          HorizontalAlignment="Left" 
                          Margin="0,0,0,0" 
                          VerticalAlignment="Top" 
                              /&gt;
                  &lt;/ItemsPanelTemplate&gt;
              &lt;/ListBox.ItemsPanel&gt;
              &lt;ListBox.ItemTemplate&gt;
                  &lt;DataTemplate&gt;
                      &lt;StackPanel Margin="5"&gt;
                          &lt;StackPanel Orientation="Vertical"&gt;
                              &lt;Grid Width="100" Height="100"&gt;
                                  &lt;Grid.Background&gt;
                                      &lt;ImageBrush Stretch="UniformToFill" ImageSource="{Binding}" /&gt;
                                  &lt;/Grid.Background&gt;
                                  &lt;toolkit:ContextMenu&gt;
                                      &lt;toolkit:MenuItem Header="Delete" Click="MenuItem_OnClick"/&gt;
                                  &lt;/toolkit:ContextMenu&gt;
                              &lt;/Grid&gt;
                          &lt;/StackPanel&gt;
                      &lt;/StackPanel&gt;
                  &lt;/DataTemplate&gt;
              &lt;/ListBox.ItemTemplate&gt;
          &lt;/ListBox&gt;
  </code></pre>
  
  <p>Thanks</p>