ChatX/chatclient/Data/MaterialTrayMenuItem.xaml

<ResourceDictionary 
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes">
    <!-- Material Design 托盘菜单样式 -->
    <Style x:Key="MaterialTrayMenuItem" TargetType="MenuItem" BasedOn="{StaticResource MaterialDesignMenuItem}">
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="BorderThickness" Value="0"/>
        <Setter Property="Padding" Value="12,8"/>
        <Setter Property="Foreground" Value="{DynamicResource MaterialDesignBody}"/>
        <Setter Property="FontSize" Value="14"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="MenuItem">
                    <Border x:Name="Border" 
                            Background="Transparent"
                            CornerRadius="4"
                            SnapsToDevicePixels="True">
                        <Grid>
                            <materialDesign:Ripple Content="{TemplateBinding Header}" Background="Transparent" Foreground="{TemplateBinding Foreground}"
                                                   HorizontalContentAlignment="Stretch" VerticalContentAlignment="Center" Padding="{TemplateBinding Padding}"/>
                        </Grid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsHighlighted" Value="True">
                            <Setter TargetName="Border" Property="Background" Value="{DynamicResource MaterialDesignSelection}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style x:Key="MaterialTrayMenu" TargetType="ContextMenu">
        <Setter Property="Background" Value="{DynamicResource MaterialDesignPaper}"/>
        <Setter Property="BorderBrush" Value="{DynamicResource MaterialDesignDivider}"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="Padding" Value="8"/>
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="Effect">
            <Setter.Value>
                <DropShadowEffect BlurRadius="16" ShadowDepth="4" Color="#40000000"/>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>