diff --git a/CPF/Controls/TreeViewItem.cs b/CPF/Controls/TreeViewItem.cs
index b15942b..c08c38e 100644
--- a/CPF/Controls/TreeViewItem.cs
+++ b/CPF/Controls/TreeViewItem.cs
@@ -30,7 +30,7 @@ namespace CPF.Controls
         public bool IsSelected
         {
             get { return GetValue<bool>(); }
-            internal set { SetValue(value); }
+            set { SetValue(value); }
         }
         /// <summary>
         /// 获取或设置标记控件的项
diff --git a/CPF/CpfObject.cs b/CPF/CpfObject.cs
index 8a80396..c7fe291 100644
--- a/CPF/CpfObject.cs
+++ b/CPF/CpfObject.cs
@@ -346,7 +346,7 @@ namespace CPF
                 List<PropertyMetadataAttribute> propertyList = new List<PropertyMetadataAttribute>();
                 var list = type.GetProperties(BindingFlags.Public | BindingFlags.Instance | BindingFlags.NonPublic);
 
-                list = list.OrderBy(a => a, new TypeCompar()).ThenBy(a => a.Name).ToArray();
+                list = list.OrderBy(a => a, new TypeCompar()).ThenBy(a => a.Name, StringComparer.Ordinal).ToArray();
 
                 OverrideMetadata om = new OverrideMetadata();
                 OnOverrideMetadata(om);
diff --git a/CPF/UIElement.cs b/CPF/UIElement.cs
index 05efc51..6a09f0e 100644
--- a/CPF/UIElement.cs
+++ b/CPF/UIElement.cs
@@ -373,8 +373,8 @@ namespace CPF
         [Description("键盘焦点")]
         public bool IsKeyboardFocused
         {
-            get { return (bool)GetValue(21); }
-            private set { SetValue(value, 21); }
+            get { return (bool)GetValue(22); }
+            private set { SetValue(value, 22); }
         }
         /// <summary>
         /// 获取一个值，该值指示键盘焦点是否位于元素或其可视化树子元素内的任意位置
@@ -383,8 +383,8 @@ namespace CPF
         [Description("获取一个值，该值指示键盘焦点是否位于元素或其可视化树子元素内的任意位置")]
         public bool IsKeyboardFocusWithin
         {
-            get { return (bool)GetValue(22); }
-            private set { SetValue(value, 22); }
+            get { return (bool)GetValue(21); }
+            private set { SetValue(value, 21); }
         }
         /// <summary>
         /// 获取焦点的导航方式
@@ -393,8 +393,8 @@ namespace CPF
         [PropertyMetadata(null)]
         public NavigationMethod? FocusMethod
         {
-            get { return (NavigationMethod?)GetValue(14); }
-            private set { SetValue(value, 14); }
+            get { return (NavigationMethod?)GetValue(13); }
+            private set { SetValue(value, 13); }
         }
 
         /// <summary>
@@ -404,8 +404,8 @@ namespace CPF
         [PropertyMetadata(false)]
         public bool Focusable
         {
-            get { return GetValue<bool>(10); }
-            set { SetValue(value, 10); }
+            get { return GetValue<bool>(14); }
+            set { SetValue(value, 14); }
         }
 
         /// <summary>
@@ -444,8 +444,8 @@ namespace CPF
         [PropertyMetadata(typeof(ViewFill), "#000")]
         public ViewFill FocusFrameFill
         {
-            get { return GetValue<ViewFill>(11); }
-            set { SetValue(value, 11); }
+            get { return GetValue<ViewFill>(10); }
+            set { SetValue(value, 10); }
         }
         /// <summary>
         /// 按tab键切换焦点显示的聚焦框
@@ -454,8 +454,8 @@ namespace CPF
         [PropertyMetadata(typeof(Stroke), "1,Dash")]
         public Stroke FocusFrameStroke
         {
-            get { return GetValue<Stroke>(13); }
-            set { SetValue(value, 13); }
+            get { return GetValue<Stroke>(12); }
+            set { SetValue(value, 12); }
         }
         /// <summary>
         /// 聚焦框到元素边缘距离
@@ -463,8 +463,8 @@ namespace CPF
         [UIPropertyMetadata(typeof(Thickness), "3", UIPropertyOptions.AffectsRender), Description("聚焦框到元素边缘距离")]
         public Thickness FocusFramePadding
         {
-            get { return GetValue<Thickness>(12); }
-            set { SetValue(value, 12); }
+            get { return GetValue<Thickness>(11); }
+            set { SetValue(value, 11); }
         }
 
         /// <summary>
@@ -1053,6 +1053,10 @@ namespace CPF
                 toolTipElement.Dispose();
                 toolTipElement = null;
             }
+            if (newValue is string str && string.IsNullOrEmpty(str))
+            {
+                return;
+            }
             if (newValue != null)
             {
                 UIElement element = newValue as UIElement;