Add the ability to verify the content of a tooltipmade up from WPF elements as the one below:
<Polygon
Points="16, 32 32, 32 24, 18"
Visibility="Visible"
ToolTipService.ShowDuration="360000" HorizontalAlignment="Right" Width="32">
<Polygon.Fill>
<SolidColorBrush Color="Aqua"/>
</Polygon.Fill>
<Polygon.ToolTip>
<StackPanel>
<TextBlock Text="Foo"/>
<Ellipse Width="20" Height="20" Fill="Pink"/>
<TextBlock Text="Bar"/>
</StackPanel>
</Polygon.ToolTip>
</Polygon>