diff --git a/SunnyUI/Controls/Color/UIColorBar.cs b/SunnyUI/Controls/Color/UIColorBar.cs
index 7c446f24..97c61947 100644
--- a/SunnyUI/Controls/Color/UIColorBar.cs
+++ b/SunnyUI/Controls/Color/UIColorBar.cs
@@ -226,7 +226,7 @@ namespace Sunny.UI
 
         protected void DrawSelector(Graphics dc, RectangleF r, Orientation orientation, float percentSet)
         {
-            Pen pen = new Pen(Color.CadetBlue);
+            using Pen pen = new Pen(Color.CadetBlue);
             percentSet = Math.Max(0, percentSet);
             percentSet = Math.Min(1, percentSet);
             if (orientation == Orientation.Vertical)
diff --git a/SunnyUI/Controls/Color/UIColorWheel.cs b/SunnyUI/Controls/Color/UIColorWheel.cs
index 52be5562..9047fbd4 100644
--- a/SunnyUI/Controls/Color/UIColorWheel.cs
+++ b/SunnyUI/Controls/Color/UIColorWheel.cs
@@ -20,6 +20,12 @@ namespace Sunny.UI
         private readonly List<Color> m_colors = new List<Color>();
         private double m_wheelLightness = 0.5;
 
+        protected override void Dispose(bool disposing)
+        {
+            base.Dispose(disposing);
+            m_brush?.Dispose();
+        }
+
         public HSLColor SelectedHSLColor
         {
             get { return m_selectedColor; }
diff --git a/SunnyUI/Controls/UIKnobControl.cs b/SunnyUI/Controls/UIKnobControl.cs
index cb8612f5..b404c3f3 100644
--- a/SunnyUI/Controls/UIKnobControl.cs
+++ b/SunnyUI/Controls/UIKnobControl.cs
@@ -623,7 +623,7 @@ namespace Sunny.UI
             // Set antialias effect on                     
             gOffScreen.SmoothingMode = SmoothingMode.AntiAlias;
             // Draw border of knob                         
-            gOffScreen.DrawEllipse(new Pen(this.BackColor), rKnob);
+            gOffScreen.DrawEllipse(this.BackColor, rKnob);
 
             //if control is focused 
             if (this.isFocused)
@@ -846,7 +846,8 @@ namespace Sunny.UI
                     int w = l / 4;
                     Point[] pt = GetKnobLine(Gr, l);
 
-                    Gr.DrawLine(new Pen(_PointerColor, w), pt[0], pt[1]);
+                    using Pen pen = new Pen(_PointerColor, w);
+                    Gr.DrawLine(pen, pt[0], pt[1]);
                 }
                 else
                 {
@@ -891,8 +892,8 @@ namespace Sunny.UI
                     Rectangle rPointer = new Rectangle(Arrow.X - w / 2, Arrow.Y - w / 2, w, h);
 
                     //Utility.DrawInsetCircle(ref Gr, rPointer, new Pen(_PointerColor));
-                    DrawInsetCircle(ref Gr, rPointer, new Pen(GetLightColor(_PointerColor, 55)));
-
+                    using Pen pen = new Pen(GetLightColor(_PointerColor, 55));
+                    DrawInsetCircle(ref Gr, rPointer, pen);
                     Gr.FillEllipse(brushKnobPointer, rPointer);
                 }
             }
@@ -1467,8 +1468,8 @@ namespace Sunny.UI
         }
         public static void DrawInsetCircle(ref Graphics g, Rectangle r, Pen p)
         {
-            Pen p1 = new Pen(GetDarkColor(p.Color, 50));
-            Pen p2 = new Pen(GetLightColor(p.Color, 50));
+            using Pen p1 = new Pen(GetDarkColor(p.Color, 50));
+            using Pen p2 = new Pen(GetLightColor(p.Color, 50));
             for (int i = 0; i < p.Width; i++)
             {
                 Rectangle r1 = new Rectangle(r.X + i, r.Y + i, r.Width - i * 2, r.Height - i * 2);
diff --git a/SunnyUI/Controls/UISmoothLabel.cs b/SunnyUI/Controls/UISmoothLabel.cs
index 9ee92145..eb5518cf 100644
--- a/SunnyUI/Controls/UISmoothLabel.cs
+++ b/SunnyUI/Controls/UISmoothLabel.cs
@@ -34,6 +34,12 @@ namespace Sunny.UI
     [DefaultProperty("Text")]
     public sealed class UISmoothLabel : Label, IStyleInterface, IZoomScale
     {
+        private PointF point;
+        private SizeF drawSize;
+        private Pen drawPen;
+        private GraphicsPath drawPath;
+        private SolidBrush forecolorBrush;
+
         public UISmoothLabel()
         {
             base.Font = UIStyles.Font();
@@ -43,11 +49,23 @@ namespace Sunny.UI
             rectColor = UIStyles.Blue.SmoothLabelRectColor;
 
             drawPath = new GraphicsPath();
-            drawPen = new Pen(new SolidBrush(rectColor), rectSize);
+            drawPen = new Pen(rectColor, rectSize);
             forecolorBrush = new SolidBrush(ForeColor);
             Size = new Size(300, 60);
         }
 
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                forecolorBrush?.Dispose();
+                drawPath?.Dispose();
+                drawPen?.Dispose();
+            }
+
+            base.Dispose(disposing);
+        }
+
         /// <summary>
         /// 禁止控件跟随窗体缩放
         /// </summary>
@@ -69,24 +87,6 @@ namespace Sunny.UI
 
         }
 
-        protected override void Dispose(bool disposing)
-        {
-            if (disposing)
-            {
-                forecolorBrush?.Dispose();
-                drawPath?.Dispose();
-                drawPen?.Dispose();
-            }
-
-            base.Dispose(disposing);
-        }
-
-        private PointF point;
-        private SizeF drawSize;
-        private Pen drawPen;
-        private GraphicsPath drawPath;
-        private SolidBrush forecolorBrush;
-
         [Browsable(false), DefaultValue(false)]
         public bool IsScaled { get; set; }