Using a MouseDoubleClick event where none exists
Reference Site:http://blogs.microsoft.co.il/pavely/2011/08/03/wpf-tip-using-a-mousedoubleclick-event-where-none-exists/
<!-- ContentControlで囲って、MouseDoubleClickを宣言する。 -->
<ContentControl MouseDoubleClick="OnDoubleClick">
<Border Margin="10" BorderBrush="Black" BorderThickness="2">
<Grid Margin="4">
<Rectangle Fill="Red" />
<TextBlock Text="Hello" FontSize="15" />
</Grid>
</Border>
</ContentControl>