We're trying to figure out how to drag an item from a LibraryStack container onto a ScatterView, like how the photo viewer sample applications work. Currently, the item just flies back into the LibraryStack after we drag it out. We can drag and drop items into other LibraryStacks or LibraryBars. 

Here's a sample of what we're trying:

```
<s:SurfaceWindow x:Class="Idia_seminar.SurfaceWindow1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:s="http://schemas.microsoft.com/surface/2008"
Title="Idia_seminar"
>
<s:SurfaceWindow.Resources>
<ImageBrush x:Key="WindowBackground" Stretch="None" Opacity="0.6" ImageSource="pack://application:,,,/Resources/WindowBackground.jpg"/>
</s:SurfaceWindow.Resources>

<Grid Background="{StaticResource WindowBackground}" >
    <s:ScatterView Name="scatterView1" AllowDrop="True">
        <s:SurfaceButton Name="surfaceButton1">Button</s:SurfaceButton>
        <s:LibraryStack AllowDrop="True">
            <s:LibraryStackItem Content="hello"></s:LibraryStackItem>
        </s:LibraryStack>
    </s:ScatterView>
</Grid>
</s:SurfaceWindow>

```

Thanks!