Listing 1

DraggableImage.xaml

<UserControl x:Class="DragImage.DraggableImage"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Name="ctrl">
    
  <Grid x:Name="LayoutRoot">
    <Grid HorizontalAlignment="Left"
          VerticalAlignment="Top">
      <Image Name="image" Stretch="None"
             Source="{Binding ElementName=ctrl, Path=Source}" />
      <Thumb DragDelta="OnThumbDragDelta">
        <Thumb.Template>
          <ControlTemplate>
            <Rectangle Fill="Transparent" />
          </ControlTemplate>
        </Thumb.Template>
      </Thumb>
      <Grid.RenderTransform>
        <TranslateTransform x:Name="translate" />
      </Grid.RenderTransform>
    </Grid>
  </Grid>
</UserControl>