diff --git a/src/Avalonia.Controls/Primitives/SelectingItemsControl.cs b/src/Avalonia.Controls/Primitives/SelectingItemsControl.cs
index e34b3b145f..4317d795f1 100644
--- a/src/Avalonia.Controls/Primitives/SelectingItemsControl.cs
+++ b/src/Avalonia.Controls/Primitives/SelectingItemsControl.cs
@@ -848,21 +848,6 @@ namespace Avalonia.Controls.Primitives
             }
         }
 
-        /// <summary>
-        /// Sets an item container's 'selected' class or <see cref="ISelectable.IsSelected"/>.
-        /// </summary>
-        /// <param name="index">The index of the item.</param>
-        /// <param name="selected">Whether the item should be selected or deselected.</param>
-        private void MarkItemSelected(int index, bool selected)
-        {
-            var container = ItemContainerGenerator?.ContainerFromIndex(index);
-
-            if (container != null)
-            {
-                MarkContainerSelected(container, selected);
-            }
-        }
-
         private void UpdateContainerSelection()
         {
             if (Presenter?.Panel is IPanel panel)
diff --git a/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesDark.xaml b/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesDark.xaml
index 4d21068492..abc02a6371 100644
--- a/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesDark.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/FluentControlResourcesDark.xaml
@@ -439,7 +439,7 @@
     <StaticResource x:Key="CalendarViewNavigationButtonBorderBrush" ResourceKey="SystemControlTransparentBrush" />
     
     <!--Resources for NotificationCard.xaml -->
-    <SolidColorBrush x:Key="NotificationCardBackgroundBrush" Color="#444444" Opacity="0.75"/>
+    <SolidColorBrush x:Key="NotificationCardBackgroundBrush" Color="#444444" />
     <SolidColorBrush x:Key="NotificationCardProgressBackgroundBrush" Color="#9A9A9A" />
     <SolidColorBrush x:Key="NotificationCardInformationBackgroundBrush" Color="#007ACC" Opacity="0.75"/>
     <SolidColorBrush x:Key="NotificationCardSuccessBackgroundBrush" Color="#1F9E45" Opacity="0.75"/>