diff --git a/Bin/net40/SunnyUI.Demo.exe b/Bin/net40/SunnyUI.Demo.exe
index 1c33e5b0..62f7b457 100644
Binary files a/Bin/net40/SunnyUI.Demo.exe and b/Bin/net40/SunnyUI.Demo.exe differ
diff --git a/SunnyUI.Demo/Charts/FLineChart.cs b/SunnyUI.Demo/Charts/FLineChart.cs
index c592d90e..a6ed0e8f 100644
--- a/SunnyUI.Demo/Charts/FLineChart.cs
+++ b/SunnyUI.Demo/Charts/FLineChart.cs
@@ -54,8 +54,8 @@ namespace Sunny.UI.Demo
             option.GreaterWarningArea = new UILineWarningArea(3.5);
             option.LessWarningArea = new UILineWarningArea(2.2, Color.Gold);
 
-            option.YAxisScaleLines.Add(new UIScaleLine() { Color = Color.Red, Name = "上限", Value = 3.5 });
-            option.YAxisScaleLines.Add(new UIScaleLine() { Color = Color.Gold, Name = "下限", Value = 2.2 });
+            option.YAxisScaleLines.Add(new UIScaleLine("上限", 3.5, Color.Red));
+            option.YAxisScaleLines.Add(new UIScaleLine("下限", 2.2, Color.Gold));
 
             option.XAxis.Name = "日期";
             option.YAxis.Name = "数值";
diff --git a/SunnyUI/Controls/UISwitch.cs b/SunnyUI/Controls/UISwitch.cs
index 19fe94d3..88a1112f 100644
--- a/SunnyUI/Controls/UISwitch.cs
+++ b/SunnyUI/Controls/UISwitch.cs
@@ -20,6 +20,7 @@
  * 2020-04-25: V2.2.4 更新主题配置类
  * 2021-05-06: V3.0.3 更新Active状态改变时触发ValueChanged事件
  * 2021-09-14: V3.0.7 增加Disabled颜色
+ * 2022-01-02: V3.0.9 增加是否只读属性
 ******************************************************************************/
 
 using System;
@@ -59,6 +60,10 @@ namespace Sunny.UI
             fillColor = Color.White;
         }
 
+        [DefaultValue(false)]
+        [Description("是否只读"), Category("SunnyUI")]
+        public bool ReadOnly { get; set; }
+
         private UISwitchShape switchShape = UISwitchShape.Round;
 
         [Description("开关形状"), Category("SunnyUI")]
@@ -173,7 +178,7 @@ namespace Sunny.UI
 
         protected override void OnClick(EventArgs e)
         {
-            Active = !Active;
+            if (!ReadOnly) Active = !Active;
             base.OnClick(e);
         }