Simple and Easy-to-Use Pie Chart Controls in WPF

<UserControl x:Class="PieControls.PieChart"
             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" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300"
             xmlns:local="clr-namespace:PieControls"
             >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
            <ColumnDefinition Width="Auto"></ColumnDefinition>
        </Grid.ColumnDefinitions>
        <local:PieControl VerticalAlignment="Center" HorizontalAlignment="Left" x:Name="Pie" 
                          Width="{Binding RelativeSource={RelativeSource Mode=Self}, Path=Height}">            
        </local:PieControl>
    </Grid>
</UserControl>