WPF window shadow effect

c#, effects, shadow, wpf

Solution

`DropShadowEffect` cannot be applied to a `Window`. Instead, if you want to override the default window appearance, you have to apply the effect to some other element contained in the window:

<Window x:Class="WpfApplication2.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525" WindowStyle="None"
        AllowsTransparency="True" Background="Transparent">

    <Grid Margin="20" Background="Red">
        <Grid.Effect>
            <DropShadowEffect BlurRadius="15" Direction="-90"
                              RenderingBias="Quality" ShadowDepth="2"/>
        </Grid.Effect>
        ...
      
    </Grid>
</Window>

Problem

I am new to WPF technology. I have the following window declaration in WPF: ``` <Window x:Class="CustomWindows.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="480" Width="640" ScrollViewer.VerticalScrollBarVisibility="Disabled" WindowStyle="None" AllowsTransparency="True"> <Window.Effect> <DropShadowEffect BlurRadius="15" Direction="-90" RenderingBias="Quality" ShadowDepth="2"/> </Window.Effect> <Grid> </Grid> </Window> ``` But when I run it, the shadow does not appear. What can I do, or where is the misstake?

Original source