MenuStyle

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <!--菜单中的颜色画刷-->
    <SolidColorBrush x:Key="MenuMouseOverBrush" Color="#cccccc"></SolidColorBrush>
    <SolidColorBrush x:Key="MenuBackgroundBrush" Color="#e9e9e9"></SolidColorBrush>
    <SolidColorBrush x:Key="MenuBorderBrush" Color="#bbbbbb"></SolidColorBrush>
    <SolidColorBrush x:Key="MenuForegroundBrush" Color="#222222"></SolidColorBrush>

    <!--菜单中小三角的颜色-->
    <SolidColorBrush x:Key="ArrowBrush" Color="#222222"></SolidColorBrush>
    <SolidColorBrush x:Key="ArrowOpenBrush" Color="#007acc"></SolidColorBrush>

    <!--MenuStyle-->
    <Style