diff --git a/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/PresentationSource.cs b/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/PresentationSource.cs
index ec0ca345fab..5009a557828 100644
--- a/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/PresentationSource.cs
+++ b/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/PresentationSource.cs
@@ -598,25 +598,20 @@ internal static object FireContentRendered(object arg)
         ///     Helper method which returns true when all the given visuals 
         ///     are in the same presentation source.
         /// </summary>
-        [FriendAccessAllowed] // To allow internal code paths to access this function 
-        internal static bool UnderSamePresentationSource(params DependencyObject[] visuals)
+        internal static bool IsUnderSamePresentationSource(params ReadOnlySpan<DependencyObject> visuals)
         {
-            if (visuals == null || visuals.Length == 0)
-            {
+            if (visuals.IsEmpty)
                 return true;
-            }
 
             PresentationSource baseSource = CriticalFromVisual(visuals[0]);
-
-            int count = visuals.Length;
-            for (int i = 1; i < count; i++)
+            for (int i = 1; i < visuals.Length; i++)
             {
-                PresentationSource currentSource = CriticalFromVisual(visuals[i]);
-                if (currentSource != baseSource)
+                if (baseSource != CriticalFromVisual(visuals[i]))
                 {
                     return false;
                 }
             }
+
             return true;
         }
 
diff --git a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Controls/Primitives/DataGridDetailsPresenter.cs b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Controls/Primitives/DataGridDetailsPresenter.cs
index d3a17df613d..04077973eeb 100644
--- a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Controls/Primitives/DataGridDetailsPresenter.cs
+++ b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Controls/Primitives/DataGridDetailsPresenter.cs
@@ -109,7 +109,7 @@ private static void OnAnyMouseLeftButtonDownThunk(object sender, MouseButtonEven
         private void OnAnyMouseLeftButtonDown(System.Windows.Input.MouseButtonEventArgs e)
         {
             // Ignore actions if the button down arises from a different presentation source
-            if (!PresentationSource.UnderSamePresentationSource(e.OriginalSource as DependencyObject, this))
+            if (!PresentationSource.IsUnderSamePresentationSource(e.OriginalSource as DependencyObject, this))
             {
                 return;
             }
diff --git a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Controls/ScrollViewer.cs b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Controls/ScrollViewer.cs
index e9e1160d139..ea4157aa30d 100644
--- a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Controls/ScrollViewer.cs
+++ b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Controls/ScrollViewer.cs
@@ -1654,7 +1654,7 @@ private bool ShouldManipulateScroll(ManipulationStartingEventArgs e, ScrollConte
         {
             // If the original source is not from the same PresentationSource as of ScrollViewer,
             // then do not start the manipulation.
-            if (!PresentationSource.UnderSamePresentationSource(e.OriginalSource as DependencyObject, this))
+            if (!PresentationSource.IsUnderSamePresentationSource(e.OriginalSource as DependencyObject, this))
             {
                 return false;
             }
diff --git a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Window.cs b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Window.cs
index 91dabdb5ac6..08c8c9d0c0c 100644
--- a/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Window.cs
+++ b/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Window.cs
@@ -7053,7 +7053,7 @@ protected override void OnManipulationBoundaryFeedback(ManipulationBoundaryFeedb
 
             // If the original source is not from the same PresentationSource as of the Window,
             // then do not act on the PanningFeedback.
-            if (!PresentationSource.UnderSamePresentationSource(e.OriginalSource as DependencyObject, this))
+            if (!PresentationSource.IsUnderSamePresentationSource(e.OriginalSource as DependencyObject, this))
             {
                 return;
             }