wpf树形图控件问题

[纵横车]

如图当鼠标移动或点击到一个条目上时，会出现白色的框，求怎么去掉？

下面是树形图的axml，几乎只设置了背景颜色

<UserControl x:Class="WpfContrl.WpfTreeView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:sys="clr-namespace:System;assembly=mscorlib"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:cal="http://www.caliburnproject.org"
             xmlns:model="clr-namespace:WpfContrl"
             mc:Ignorable="d" 
             d:DesignHeight="414" d:DesignWidth="461">
    
    <UserControl.Resources>
        
       

    </UserControl.Resources>

    <!--DataType="{x:Type model:DepartmentModel}" Style="{DynamicResource TreeViewStyle1}" -->
    <DockPanel Name="DockPanel1" LastChildFill="True">
        <TreeView Margin="0,0,0,0" Name="treeView1" Background="#34373E" TreeViewItem.Selected="tvListDataTable_Selected">
            <TreeView.ItemTemplate>
                <HierarchicalDataTemplate   ItemsSource="{Binding Nodes, IsAsync=True}">
                    <StackPanel Orientation="Horizontal" Background="Red">
                        <Image VerticalAlignment="Center" Source="{Binding Path=Icon}" Width="16" Height="16" Margin="0,0,2,2"></Image>
                        <TextBlock VerticalAlignment="Center" FontSize="14" Text="{Binding Path=deptName}" Margin="2,0,0,0" ></TextBlock>
                    </StackPanel>
                </HierarchicalDataTemplate>
            </TreeView.ItemTemplate>
        </TreeView>
    </DockPanel>
</UserControl>

尝试设置过<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="LightBlue" Opacity=".0"/>属性，
也加过Triggers，在鼠标移进的时候手动设置背景色。也没有用

另，这种白框只在windows server2012 r2上测试出现，win7，win10均为出现。