添加项目文件。

Wpf.Ui.Extend/Controls/FluentWindowEx/FluentWindowEx.xaml

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+<ResourceDictionary
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:controls="http://schemas.lepo.co/wpfui/2022/xaml"
+    xmlns:exc="clr-namespace:Wpf.Ui.Extend.Controls">
+    <Style x:Key="DefaultFluentWindowExStyle" TargetType="{x:Type exc:FluentWindowEx}">
+        <Setter Property="Background" Value="{DynamicResource WindowBackground}" />
+        <Setter Property="Foreground" Value="{DynamicResource WindowForeground}" />
+        <Setter Property="BorderBrush" Value="Transparent" />
+        <Setter Property="BorderThickness" Value="0" />
+        <Setter Property="MinWidth" Value="280" />
+        <Setter Property="Margin" Value="0" />
+        <Setter Property="Padding" Value="0" />
+        <Setter Property="FontSize" Value="{DynamicResource ControlContentThemeFontSize}" />
+        <Setter Property="FontWeight" Value="Normal" />
+        <Setter Property="UseLayoutRounding" Value="True" />
+        <Setter Property="SnapsToDevicePixels" Value="True" />
+        <Setter Property="OverridesDefaultStyle" Value="True" />
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="{x:Type exc:FluentWindowEx}">
+                    <DockPanel>
+                        <controls:TitleBar
+                            Title="{TemplateBinding Title}"
+                            Background="{TemplateBinding Background}"
+                            DockPanel.Dock="Top"
+                            Icon="{TemplateBinding TitleIcon}" />
+                        <AdornerDecorator>
+                            <controls:ClientAreaBorder
+                                Background="{TemplateBinding Background}"
+                                BorderBrush="{TemplateBinding BorderBrush}"
+                                BorderThickness="{TemplateBinding BorderThickness}">
+                                <ContentPresenter x:Name="ContentPresenter" />
+                            </controls:ClientAreaBorder>
+                        </AdornerDecorator>
+                        <!--<controls:SnackbarPresenter x:Name="SnackbarPresenter" DockPanel.Dock="Bottom" />-->
+                    </DockPanel>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+    <Style BasedOn="{StaticResource DefaultFluentWindowExStyle}" TargetType="{x:Type exc:FluentWindowEx}" />
+</ResourceDictionary>