ZZ-EFEM/Framework/AitexSorterUI/Controls/Common/LED.xaml

<UserControl x:Class="Aitex.Sorter.UI.Controls.Common.LED"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:Aitex.Sorter.UI.Controls.Common"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
	<Grid x:Name="root">
		<Ellipse  HorizontalAlignment="Center" VerticalAlignment="Center"  Stroke="Gray" StrokeThickness="2"  Width="15" Height="15" >
			<Ellipse.Fill>
				<MultiBinding Converter="{StaticResource ledConverter}">
					<Binding Path="On" />
					<Binding Path="IsRed" />
				</MultiBinding>
			</Ellipse.Fill>
		</Ellipse>
	</Grid>
</UserControl>