wpf隐藏窗体顶部的导航栏

<Window x:Class="wpf.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:wpf"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <WindowChrome.WindowChrome> //添加如下代码
        <WindowChrome CaptionHeight="50" UseAeroCaptionButtons="False"></WindowChrome>
    </WindowChrome.WindowChrome>
    <Grid>


    </Grid>
</Window>