<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:po="http://schemas.microsoft.com/winfx/2006/xaml/presentation/options">

    <!--  thanks: http://marcangers.com/material-design-shadows-in-wpf/ -->

    <Color x:Key="MaterialDesignShadow">#AA000000</Color>
    <SolidColorBrush x:Key="MaterialDesignShadowBrush" Color="{StaticResource MaterialDesignShadow}"/>

    <DropShadowEffect x:Key="MaterialDesignShadowDepth1" BlurRadius="5" ShadowDepth="1" Direction="270" Color="{StaticResource MaterialDesignShadow}" Opacity=".1" RenderingBias="Performance" po:Freeze="True" />
    <DropShadowEffect x:Key="MaterialDesignShadowDepth2" BlurRadius="8" ShadowDepth="1.5" Direction="270" Color="{StaticResource MaterialDesignShadow}" Opacity=".1" RenderingBias="Performance" po:Freeze="True" />
    <DropShadowEffect x:Key="MaterialDesignShadowDepth3" BlurRadius="14" ShadowDepth="4.5" Direction="270" Color="{StaticResource MaterialDesignShadow}" Opacity=".1" RenderingBias="Performance" po:Freeze="True" />
    <DropShadowEffect x:Key="MaterialDesignShadowDepth4" BlurRadius="25" ShadowDepth="8" Direction="270" Color="{StaticResource MaterialDesignShadow}" Opacity=".1" RenderingBias="Performance" po:Freeze="True" />
    <DropShadowEffect x:Key="MaterialDesignShadowDepth5" BlurRadius="35" ShadowDepth="13" Direction="270" Color="{StaticResource MaterialDesignShadow}" Opacity=".1" RenderingBias="Performance" po:Freeze="True" />

</ResourceDictionary>
