Fixed member access

Author: chris-blackman

Microsoft.Toolkit.Uwp.UI.Media/Shadows/AttachedCardShadow.cs

@@ -26,6 +26,9 @@ public class AttachedCardShadow : AttachedShadowBase
         private static readonly TypedResourceKey<CompositionSurfaceBrush> SurfaceBrushResourceKey = "SurfaceBrush";
         private static readonly TypedResourceKey<CompositionVisualSurface> VisualSurfaceResourceKey = "VisualSurface";
 
+        /// <summary>
+        /// The <see cref="DependencyProperty"/> for <see cref="CornerRadius"/>
+        /// </summary>
         public static readonly DependencyProperty CornerRadiusProperty =
             DependencyProperty.Register(
                 nameof(CornerRadius),
@@ -40,23 +43,16 @@ static AttachedCardShadow()
         }
 
         /// <summary>
-        /// Gets or sets the roundness of the shadow's corners
+        /// Gets or sets the roundness of the shadow's corners.
         /// </summary>
         public double CornerRadius
         {
             get => (double)GetValue(CornerRadiusProperty);
             set => SetValue(CornerRadiusProperty, value);
         }
 
-        /// <summary>
-        /// <inheritdoc/>
-        /// </summary>
         public override bool IsSupported => SupportsCompositionVisualSurface;
-
-        /// <summary>
-        /// <inheritdoc/>
-        /// </summary>
-        public override bool SupportsOnSizeChangedEvent => true;
+        protected override bool SupportsOnSizeChangedEvent => true;
 
         protected override void OnElementContextUninitialized(AttachedShadowElementContext context)
         {