ELK/FrameworkLocal/UIClient/CenterViews/Controls/LED.xaml

<UserControl x:Class="MECF.Framework.UI.Client.CenterViews.Controls.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:controls="clr-namespace:MECF.Framework.UI.Client.CenterViews.Controls"
             mc:Ignorable="d"
             d:DesignHeight="300" d:DesignWidth="300">
    <UserControl.Resources>
        <controls:LedConverter x:Key="ledConverter" />
    </UserControl.Resources>
    <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>