chore: minor modify.

Author: NaBian

src/Shared/HandyControlDemo_Shared/Data/DemoInfo.json

@@ -123,7 +123,7 @@
     "demoItemList": [
       [ "HatchBrushGenerator", "HatchBrushGeneratorDemo", "Brush.DataGenerator", "", "" ],
       [ "MorphingAnimation", "GeometryAnimationDemo", "Brush.Animation", "", "" ],
-      [ "Effects", "EffectsDemo", "Brush.Effects", "", "" ],
+      [ "Effects", "EffectsDemo", "Brush.Effects", "", "" ]
     ]
   }
 ]

src/Shared/HandyControl_Shared/Controls/ConfettiCannon/ConfettiCannon.cs

@@ -11,7 +11,7 @@
 
 namespace HandyControl.Controls;
 
-public class ConfettiCannon : DependencyObject
+public class ConfettiCannon
 {
     public static readonly DependencyProperty TokenProperty = DependencyProperty.RegisterAttached(
         "Token", typeof(string), typeof(ConfettiCannon), new PropertyMetadata(null, OnTokenChanged));
@@ -30,11 +30,6 @@ public static string GetToken(DependencyObject element)
     private readonly DrawingVisual _offscreenVisual = new();
     private readonly ConcurrentQueue<Confetti> _confettis = [];
 
-    private readonly EllipseGeometry _sharedCircleGeometry = new()
-    {
-        Transform = new RotateTransform()
-    };
-
     private Rect _renderRect;
     private AdornerLayer _currentAdornerLayer;