Kepler-Release/Venus/Venus_Themes/UserControls/LoadLockLeft.xaml

<UserControl x:Class="Venus_Themes.UserControls.LoadLockLeft"
             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:Venus_Themes.UserControls"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <Viewbox Stretch="Fill" >
        <Polygon Stroke="Black"  StrokeThickness="2" Points="0,200 0,100 36,0 200,90 140,200">
            <Polygon.Fill>
                <LinearGradientBrush StartPoint="0,0" EndPoint="1,1">
                    <GradientStop Color="Silver" Offset="0.0" />
                    <GradientStop Color="White" Offset="0.5" />
                    <GradientStop Color="Silver" Offset="1" />
                </LinearGradientBrush>
            </Polygon.Fill>
            
        </Polygon>
    </Viewbox>
</UserControl>