添加项目文件。

SamplePreSystem.UI/Styles/BaseTreeView.xaml

@@ -0,0 +1,13 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+
+
+    <!--  仅针对字体、间距的TreeView极简美化样式  -->
+    <Style TargetType="TreeView">
+        <!--  TreeView整体内边距：避免控件紧贴窗口  -->
+        <Setter Property="Padding" Value="8" />
+        <!--  整体背景：白色更清爽  -->
+        <Setter Property="Background" Value="White" />
+        <!--  滚动条优化：避免文字被遮挡  -->
+        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto" />
+    </Style>
+</ResourceDictionary>