Win11Debloat/Schemas/MessageBoxWindow.xaml

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MessageBox" 
        Width="440"
        SizeToContent="Height"
        MaxHeight="500"
        ResizeMode="NoResize"
        WindowStartupLocation="CenterOwner"
        WindowStyle="None"
        AllowsTransparency="True"
        Background="Transparent"
        Topmost="True"
        ShowInTaskbar="False">

    <Border BorderBrush="{DynamicResource BorderColor}" 
            BorderThickness="1" 
            CornerRadius="8"
            Background="{DynamicResource CardBgColor}"
            Margin="25">
        <Border.Effect>
            <DropShadowEffect Color="Black" 
                            Opacity="0.15" 
                            BlurRadius="20" 
                            ShadowDepth="0" 
                            Direction="0"/>
        </Border.Effect>
        
        <Grid Margin="0">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="*"/>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>

            <!-- Title Bar -->
            <Grid Grid.Row="0" x:Name="TitleBar" Height="40" Background="Transparent">
                <TextBlock x:Name="TitleText" 
                           Text="Message" 
                           Foreground="{DynamicResource FgColor}"
                           FontSize="16"
                           FontWeight="SemiBold"
                           VerticalAlignment="Center" 
                           Margin="16,0,0,0"/>
            </Grid>

            <!-- Message Content -->
            <ScrollViewer Grid.Row="1" VerticalScrollBarVisibility="Auto" MaxHeight="500" Padding="0" Margin="20,12,1,20">
                <Grid Margin="0,0,20,0">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="Auto"/>
                        <ColumnDefinition Width="*"/>
                    </Grid.ColumnDefinitions>

                    <!-- Icon -->
                    <TextBlock x:Name="IconText"
                               Grid.Column="0"
                               FontFamily="Segoe Fluent Icons"
                               FontSize="24"
                               Foreground="{DynamicResource FgColor}"
                               VerticalAlignment="Center"
                               Margin="4,2,14,0"
                               Visibility="Collapsed"/>

                    <!-- Message Text -->
                    <TextBlock x:Name="MessageText"
                               Grid.Column="1"
                               Text="Message content goes here"
                               TextWrapping="Wrap"
                               FontSize="14"
                               LineHeight="20"
                               Foreground="{DynamicResource FgColor}"
                               VerticalAlignment="Center"/>
                </Grid>
            </ScrollViewer>

            <!-- Button Panel -->
            <Border Grid.Row="2" 
                    Background="{DynamicResource BgColor}"
                    BorderBrush="{DynamicResource BorderColor}"
                    BorderThickness="0,1,0,0"
                    Padding="16,12"
                    CornerRadius="0,0,8,8">
                <StackPanel x:Name="ButtonPanel"
                            Orientation="Horizontal"
                            HorizontalAlignment="Right">
                    <Button x:Name="Button1" 
                            Content="OK" 
                            Height="32" MinWidth="80" Margin="4,0"
                            Style="{DynamicResource PrimaryButtonStyle}"/>
                    <Button x:Name="Button2" 
                            Content="Cancel" 
                            Height="32" MinWidth="80" Margin="4,0"
                            Style="{DynamicResource SecondaryButtonStyle}"
                            Visibility="Collapsed"/>
                </StackPanel>
            </Border>
        </Grid>
    </Border>
</Window>