diff --git a/source/iNKORE.UI.WPF.Modern.Controls/Controls/MessageBox/MessageBox.cs b/source/iNKORE.UI.WPF.Modern.Controls/Controls/MessageBox/MessageBox.cs
index e174b091..08c317e1 100644
--- a/source/iNKORE.UI.WPF.Modern.Controls/Controls/MessageBox/MessageBox.cs
+++ b/source/iNKORE.UI.WPF.Modern.Controls/Controls/MessageBox/MessageBox.cs
@@ -13,6 +13,7 @@
 using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Interop;
+using System.Windows.Media;
 using static iNKORE.UI.WPF.Modern.Controls.LocalizedDialogCommands;
 
 namespace iNKORE.UI.WPF.Modern.Controls
@@ -27,10 +28,11 @@ public MessageBoxResult Result
 
 
 
-        private Button OKButton { get; set; }
-        private Button YesButton { get; set; }
-        private Button NoButton { get; set; }
-        private Button CancelButton { get; set; }
+        public Button OKButton { get; private set; }
+        public Button YesButton { get; private set; }
+        public Button NoButton { get; private set; }
+        public Button CancelButton { get; private set; }
+        public Border Border_UpperBackground { get; private set; }
 
         public static BackdropType DefaultBackdropType { get; set; } = BackdropType.None;
 
@@ -39,6 +41,8 @@ static MessageBox()
             DefaultStyleKeyProperty.OverrideMetadata(typeof(MessageBox), new FrameworkPropertyMetadata(typeof(MessageBox)));
         }
 
+        public static readonly DependencyPropertyDescriptor SystemBackdropTypeProperty_Descriptor = DependencyPropertyDescriptor.FromProperty(WindowHelper.SystemBackdropTypeProperty, typeof(MessageBox));
+
         public MessageBox()
         {
             SetValue(TemplateSettingsPropertyKey, new MessageBoxTemplateSettings());
@@ -46,6 +50,27 @@ public MessageBox()
             ThemeManager.AddActualThemeChangedHandler(this, handler);
 
             Loaded += On_Loaded;
+
+            SystemBackdropTypeProperty_Descriptor.AddValueChanged(this, SystemBackdropTypeProperty_ValueChanged);
+        }
+
+        private void SystemBackdropTypeProperty_ValueChanged(object sender, EventArgs e)
+        {
+            var backdrop = WindowHelper.GetSystemBackdropType(this);
+
+            if(this.ReadLocalValue(BackgroundProperty) == DependencyProperty.UnsetValue)
+            {
+                if (backdrop == BackdropType.None || !backdrop.IsSupported())
+                {
+                    this.SetResourceReference(BackgroundProperty, ThemeKeys.ContentDialogBackgroundKey);
+                    Border_UpperBackground?.SetResourceReference(BackgroundProperty, ThemeKeys.ContentDialogTopOverlayKey);
+                }
+                else
+                {
+                    this.Background = Brushes.Transparent;
+                    Border_UpperBackground?.SetResourceReference(BackgroundProperty, ThemeKeys.LayerOnAcrylicFillColorDefaultBrushKey);
+                }
+            }
         }
 
         #region Caption
@@ -449,9 +474,9 @@ public MessageBoxTemplateSettings TemplateSettings
 
         public event TypedEventHandler<MessageBox, MessageBoxOpenedEventArgs> Opened;
 
-        public event TypedEventHandler<MessageBox, MessageBoxClosingEventArgs> Closing;
+        public new event TypedEventHandler<MessageBox, MessageBoxClosingEventArgs> Closing;
 
-        public event TypedEventHandler<MessageBox, MessageBoxClosedEventArgs> Closed;
+        public new event TypedEventHandler<MessageBox, MessageBoxClosedEventArgs> Closed;
 
         public event TypedEventHandler<MessageBox, MessageBoxButtonClickEventArgs> OKButtonClick;
 
@@ -507,6 +532,7 @@ public override void OnApplyTemplate()
             YesButton = GetTemplateChild(nameof(YesButton)) as Button;
             NoButton = GetTemplateChild(nameof(NoButton)) as Button;
             CancelButton = GetTemplateChild(nameof(CancelButton)) as Button;
+            Border_UpperBackground = GetTemplateChild(nameof(Border_UpperBackground)) as Border;
 
             if (OKButton != null)
             {
@@ -760,6 +786,8 @@ private void On_Loaded(object sender, RoutedEventArgs e)
             {
                 WindowHelper.SetSystemBackdropType(this, DefaultBackdropType);
             }
+
+            SystemBackdropTypeProperty_ValueChanged(sender, e);
         }
 
         private static void TryExecuteCommand(ICommand command, object parameter)
diff --git a/source/iNKORE.UI.WPF.Modern.Controls/Controls/MessageBox/MessageBox.xaml b/source/iNKORE.UI.WPF.Modern.Controls/Controls/MessageBox/MessageBox.xaml
index 9644db19..8074f171 100644
--- a/source/iNKORE.UI.WPF.Modern.Controls/Controls/MessageBox/MessageBox.xaml
+++ b/source/iNKORE.UI.WPF.Modern.Controls/Controls/MessageBox/MessageBox.xaml
@@ -284,9 +284,9 @@
                             <Setter TargetName="CancelButton" Property="Style" Value="{DynamicResource AccentButtonStyle}" />
                         </Trigger>
 
-                        <Trigger Property="ui:WindowHelper.SystemBackdropType" Value="None">
+                        <!--<Trigger Property="ui:WindowHelper.SystemBackdropType" Value="None">
                             <Setter TargetName="Border_UpperBackground" Property="Background" Value="{DynamicResource ContentDialogTopOverlay}"/>
-                        </Trigger>
+                        </Trigger>-->
                         
                     </ControlTemplate.Triggers>
                 </ControlTemplate>
@@ -296,9 +296,9 @@
             <!--<Trigger Property="ui:WindowHelper.SystemBackdropType" Value="Acrylic">
                 <Setter Property="WindowChrome.WindowChrome" Value="{DynamicResource AcrylicWindowChrome}"/>
             </Trigger>-->
-            <Trigger Property="ui:WindowHelper.SystemBackdropType" Value="None">
+            <!--<Trigger Property="ui:WindowHelper.SystemBackdropType" Value="None">
                 <Setter Property="Background" Value="{DynamicResource ContentDialogBackground}"/>
-            </Trigger>
+            </Trigger>-->
         </Style.Triggers>
     </Style>
 
diff --git a/source/iNKORE.UI.WPF.Modern/Helpers/ColorsHelper.cs b/source/iNKORE.UI.WPF.Modern/Helpers/ColorsHelper.cs
index 085bb81f..e9b7b39a 100644
--- a/source/iNKORE.UI.WPF.Modern/Helpers/ColorsHelper.cs
+++ b/source/iNKORE.UI.WPF.Modern/Helpers/ColorsHelper.cs
@@ -22,7 +22,7 @@
 
 namespace iNKORE.UI.WPF.Modern.Helpers
 {
-    internal class ColorsHelper : DispatcherObject
+    public class ColorsHelper : DispatcherObject
     {
         private const string AccentKey = "SystemAccentColor";
         private const string AccentDark1Key = "SystemAccentColorDark1";
diff --git a/source/samples/WpfApp1/MainWindow.xaml b/source/samples/WpfApp1/MainWindow.xaml
index ad58b5c0..56ee269b 100644
--- a/source/samples/WpfApp1/MainWindow.xaml
+++ b/source/samples/WpfApp1/MainWindow.xaml
@@ -11,7 +11,7 @@
      ui:TitleBar.ExtendViewIntoTitleBar="False" ui:WindowHelper.SystemBackdropType="Acrylic"
      ui:WindowHelper.UseModernWindowStyle="True"
      ui:TitleBar.IsBackButtonVisible="False" ui:ThemeManager.RequestedTheme="Light"
-        ui:WindowHelper.CornerStyle="DoNotRound" Background="{x:Null}" Loaded="Window_Loaded">
+        ui:WindowHelper.CornerStyle="DoNotRound" Background="Red" Loaded="Window_Loaded">
     <Canvas>
         <ComboBox SelectionChanged="ComboBox_SelectionChanged" Height="35" IsEditable="True">
             <ComboBoxItem Content="Item1"/>