ZZ-EFEM/Jet/Jet_001_2P_Jet/EfemUI/Controls/Buffer.xaml

<UserControl x:Class="EfemUI.Controls.Buffer"
             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:EfemUI.Controls"
             mc:Ignorable="d" 
             d:DesignHeight="100" d:DesignWidth="100">
    <Grid>
        <Rectangle Width="94" Height="94" RadiusX="5" RadiusY="5" Canvas.Left="27" Canvas.Top="27" Stroke="Gray" StrokeThickness="1.5" HorizontalAlignment="Center" VerticalAlignment="Top">
            <Rectangle.Fill>
                <LinearGradientBrush StartPoint="1,0" EndPoint="0,1">
                    <GradientStop Offset="0" Color="#898989"/>
                    <GradientStop Offset="0.3" Color="#e3e2e2"/>
                    <GradientStop Offset="0.5" Color="#b0adad"/>
                    <GradientStop Offset="0.7" Color="#e3e2e2"/>
                    <GradientStop Offset="1" Color="#898989"/>
                </LinearGradientBrush>
            </Rectangle.Fill>
        </Rectangle>
        <Ellipse  Width="80" Height="80" Canvas.Left="29" Canvas.Top="29" Fill="White" Stroke="#898989" StrokeThickness="2" HorizontalAlignment="Center" VerticalAlignment="Top" Margin="0,7,0,0"/>
        <Ellipse  Width="70" Height="70" Canvas.Left="34" Canvas.Top="34" Stroke="#898989" StrokeThickness="1" HorizontalAlignment="Center" VerticalAlignment="Top" Margin="0,12,0,0">
            <Ellipse.Fill>
                <LinearGradientBrush StartPoint="0,0" EndPoint="1,1">
                    <GradientStop Offset="0" Color="Gray"/>
                    <GradientStop Offset="0.5" Color="White"/>
                    <GradientStop Offset="1" Color="Gray"/>
                </LinearGradientBrush>
            </Ellipse.Fill>
        </Ellipse>
    </Grid>
</UserControl>