OnlineMonitorSystem/HandyControl/HandyControl_Shared/Themes/Basic/Effects.xaml

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

    <Color x:Key="EffectShadowColor">#88000000</Color>

    <DropShadowEffect x:Key="EffectShadow1" BlurRadius="5" ShadowDepth="1" Direction="270" Color="{StaticResource EffectShadowColor}" Opacity=".2" RenderingBias="Performance" o:Freeze="True" />
    <DropShadowEffect x:Key="EffectShadow2" BlurRadius="8" ShadowDepth="1.5" Direction="270" Color="{StaticResource EffectShadowColor}" Opacity=".2" RenderingBias="Performance" o:Freeze="True" />
    <DropShadowEffect x:Key="EffectShadow3" BlurRadius="14" ShadowDepth="4.5" Direction="270" Color="{StaticResource EffectShadowColor}" Opacity=".2" RenderingBias="Performance" o:Freeze="True" />
    <DropShadowEffect x:Key="EffectShadow4" BlurRadius="25" ShadowDepth="8" Direction="270" Color="{StaticResource EffectShadowColor}" Opacity=".2" RenderingBias="Performance" o:Freeze="True" />
    <DropShadowEffect x:Key="EffectShadow5" BlurRadius="35" ShadowDepth="13" Direction="270" Color="{StaticResource EffectShadowColor}" Opacity=".2" RenderingBias="Performance" o:Freeze="True" />

</ResourceDictionary>