WPF如何给window加阴影效果

        <Style x:Key="WindowStyle1" TargetType="{x:Type Window}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type Window}">
                        <Grid>
                            <Border BorderThickness="1" BorderBrush="Silver" Margin="0">
                                <Border.Effect>
                                    <DropShadowEffect ShadowDepth="0" BlurRadius="5" Color="Black"/>
                                </Border.Effect>
                                <ContentPresenter/>
                            </Border>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

把这段代码帖到window得Resources下面，最后在window上面运用这个样式Style="{DynamicResource WindowStyle1}"