diff --git a/SmartUI.Demo/MainWindow.xaml b/SmartUI.Demo/MainWindow.xaml
index 93b92d3d0c0425540033ce42145a2d3d07749e42..b5565d3ce16e7b5a326bd4b82c7bb564936bb137 100644
--- a/SmartUI.Demo/MainWindow.xaml
+++ b/SmartUI.Demo/MainWindow.xaml
@@ -8,7 +8,7 @@
         xmlns:assist="clr-namespace:SmartUI.Assist;assembly=SmartUI"
         mc:Ignorable="d" Style="{StaticResource DefaultWindowStyle}"
         Title="SmartUI" Height="500" Width="1000" WindowStartupLocation="CenterScreen">
-    <TabControl IsTabStop="False" Margin="0">
+    <TabControl IsTabStop="False" Margin="0" SelectedIndex="2">
         <TabItem Header="Button">
             <UniformGrid Columns="7" Rows="6">
                 <Label Content="默认样式"/>
@@ -124,12 +124,15 @@
                 <WrapPanel Orientation="Horizontal" Height="50">
                     <Label Content="Select选择器"/>
                     <smart:ComboBoxControl Height="35" Width="200">
-                        <ComboBoxItem>选项一</ComboBoxItem>
-                        <ComboBoxItem>选项二</ComboBoxItem>
-                        <ComboBoxItem>选项三</ComboBoxItem>
-                        <ComboBoxItem>选项四</ComboBoxItem>
-                        <ComboBoxItem>选项五</ComboBoxItem>
+                        <ComboBoxItem Content="选项一"/>
+                        <ComboBoxItem Content="选项二"/>
+                        <ComboBoxItem Content="选项三"/>
+                        <ComboBoxItem Content="选项四"/>
+                        <ComboBoxItem Content="选项五"/>
                     </smart:ComboBoxControl>
+                    <smart:Cascader ItemsSource="{Binding CascaderItemSource}">
+                        
+                    </smart:Cascader>
                 </WrapPanel>
                 <WrapPanel Orientation="Horizontal" Height="50">
                     <Label Content="Switch 开关"/>
diff --git a/SmartUI.Demo/MainWindowModel.cs b/SmartUI.Demo/MainWindowModel.cs
index 0e30a6f2a155e2b949acb56db7288a231107979d..793c72e0c5b0755c93d90b098fdeddf31d514c3a 100644
--- a/SmartUI.Demo/MainWindowModel.cs
+++ b/SmartUI.Demo/MainWindowModel.cs
@@ -1,4 +1,5 @@
-using SmartUI.Common.Enum;
+using SmartUI.Base;
+using SmartUI.Common.Enum;
 using SmartUI.Demo.Common;
 using System;
 using System.Collections.Generic;
@@ -42,14 +43,14 @@ namespace SmartUI.Demo
 
         public MainWindowModel()
         {
-            _iconsArray = (PackIconKind[]) Enum.GetValues(typeof(PackIconKind));
-            Icons = new ObservableCollection<PackIconKind>(_iconsArray.Take(_iconsPageIndex* _pageSize));
+            _iconsArray = (PackIconKind[])Enum.GetValues(typeof(PackIconKind));
+            Icons = new ObservableCollection<PackIconKind>(_iconsArray.Take(_iconsPageIndex * _pageSize));
             LoadMoreIconCommand = new RelayCommand(new Action<object>(LoadMoreIcon));
         }
 
         private void LoadMoreIcon(object obj)
         {
-            _iconsArray.Skip((_iconsPageIndex - 1) * _pageSize).Take(_pageSize).ToList().ForEach(p => {Icons.Add(p); });
+            _iconsArray.Skip((_iconsPageIndex - 1) * _pageSize).Take(_pageSize).ToList().ForEach(p => { Icons.Add(p); });
         }
 
 
@@ -63,5 +64,41 @@ namespace SmartUI.Demo
             }
         }
         public event PropertyChangedEventHandler PropertyChanged;
+
+
+        public ObservableCollection<CascaderItem> CascaderItemSource { get; set; } = new ObservableCollection<CascaderItem>()
+        {
+            new CascaderItem()
+            {
+                DisplayName="选项一",Children=new ObservableCollection<CascaderItem>(){
+                    new CascaderItem(){DisplayName="子项一",Children=new ObservableCollection<CascaderItem>(){
+                        new CascaderItem(){DisplayName="子子项一"} ,
+                        new CascaderItem(){DisplayName="子子项二"} ,
+                        new CascaderItem(){DisplayName="子子项三"} ,
+                        new CascaderItem(){DisplayName="子子项四"} ,
+                        new CascaderItem(){DisplayName="子子项五"} }
+                    },
+                    new CascaderItem()
+                    {
+                        DisplayName = "子项二",Children = new ObservableCollection<CascaderItem>(){
+                                new CascaderItem(){DisplayName="子子项一"},
+                                new CascaderItem()
+                                {
+                                    DisplayName = "子项三",Children = new ObservableCollection<CascaderItem>(){
+                                     new CascaderItem(){DisplayName="子子项一"} }}
+                                }
+                    }
+                },
+            },
+            new CascaderItem()
+            {
+                DisplayName = "选项二",
+                Children = new ObservableCollection<CascaderItem>(){
+                new CascaderItem(){DisplayName="子项二",Children=new ObservableCollection<CascaderItem>(){
+                    new CascaderItem(){DisplayName="子子项二"} }
+                } }
+            }
+        };
+
     }
 }
diff --git a/SmartUI/Assist/ButtonAssist.cs b/SmartUI/Assist/ButtonAssist.cs
index 703e88ae563d012150c83410726bc8f807e095aa..d26eb87fe7307ed22198a5f2622df12d42064ec9 100644
--- a/SmartUI/Assist/ButtonAssist.cs
+++ b/SmartUI/Assist/ButtonAssist.cs
@@ -43,7 +43,7 @@ namespace SmartUI.Assist
                 ButtonBase currentItem = default;
                 if (item is RadioButton itemRadio && itemRadio.GroupName.Equals(groupName))
                 {
-                    currentItem = preButton;
+                    currentItem = itemRadio;
                 }
                 else if (item is CheckBox check)
                 {
@@ -70,7 +70,7 @@ namespace SmartUI.Assist
                 if (border != null)
                 {
                     border.CornerRadius = new CornerRadius(0, 4, 4, 0);
-                    border.BorderThickness = new Thickness(0, 1, 1, 1);
+                    border.BorderThickness = new Thickness(1, 1, 1, 1);
                 }
             }
         }
diff --git a/SmartUI/Controls/Cascader.cs b/SmartUI/Controls/Cascader.cs
new file mode 100644
index 0000000000000000000000000000000000000000..bf43358c95b48aebb767437ba8dea87c9b7c185e
--- /dev/null
+++ b/SmartUI/Controls/Cascader.cs
@@ -0,0 +1,129 @@
+using SmartUI.Base;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace SmartUI.Controls
+{
+    public class Cascader : ComboBox
+    {
+        private const string ITEMSPANEL = "Pack_items";
+        private StackPanel _itemsPanle;
+        private Border _border;
+
+        public new ObservableCollection<CascaderItem> ItemsSource
+        {
+            get { return (ObservableCollection<CascaderItem>)GetValue(ItemsSourceProperty); }
+            set { SetValue(ItemsSourceProperty, value); }
+        }
+
+        public static new readonly DependencyProperty ItemsSourceProperty =
+            DependencyProperty.Register(nameof(ItemsSource), typeof(ObservableCollection<CascaderItem>), typeof(Cascader), new PropertyMetadata(default, ItemSourceChanged));
+
+        private static void ItemSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            if (!(d is Cascader cascader && e.NewValue is ObservableCollection<CascaderItem> source))
+            {
+                return;
+            }
+            cascader.RaiseItems(source);
+        }
+
+
+
+
+
+        protected override void OnSelectionChanged(SelectionChangedEventArgs e)
+        {
+            base.OnSelectionChanged(e);
+            IsDropDownOpen = true;
+        }
+
+        public override void OnApplyTemplate()
+        {
+            base.OnApplyTemplate();
+            _itemsPanle = GetTemplateChild(ITEMSPANEL) as StackPanel;
+            if (_itemsPanle != null)
+                RaiseItems(ItemsSource);
+            _border = GetTemplateChild("border") as Border;
+            _border.MouseLeftButtonDown += Border_MouseLeftButtonDown;
+        }
+
+        private void RaiseItems(ObservableCollection<CascaderItem> source)
+        {
+            if (_itemsPanle is null || source is null || source.Count == 0)
+                return;
+            ListBox control = new ListBox() { ItemsSource = source };
+            control.SelectionChanged += Control_SelectionChanged;
+            _itemsPanle.Children.Add(control);
+        }
+
+        private void Control_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            if (sender is ListBox list)
+            {
+                if (e.RemovedItems.Count > 0)
+                    (e.RemovedItems[0] as CascaderItem).IsChecked = false;
+                int index = _itemsPanle.Children.IndexOf(list);
+                if (e.AddedItems.Count == 0)
+                    return;
+                CascaderItem model = e.AddedItems[0] as CascaderItem;
+                model.IsChecked = true;
+                if (model.Children is null || model.Children.Count == 0)
+                {
+                    IsDropDownOpen = false;
+                    if (index + 1 < _itemsPanle.Children.Count)
+                        _itemsPanle.Children.RemoveRange(index + 1, _itemsPanle.Children.Count - index - 1);
+                    this.Text = GetParentNames(model);
+                    this.SelectedItem = model.Data;
+                    return;
+                }
+                IsDropDownOpen = true;
+                foreach (var item in model.Children)
+                {
+                    item.ParentTree = model;
+                }
+                if (_itemsPanle.Children.Count == index + 1)
+                {
+                    RaiseItems(model.Children);
+                }
+                else if (_itemsPanle.Children.Count - 1 > index)
+                {
+                    (_itemsPanle.Children[index + 1] as ListBox).ItemsSource = model.Children;
+                    if (index + 2 < _itemsPanle.Children.Count)
+                        _itemsPanle.Children.RemoveRange(index + 2, _itemsPanle.Children.Count - index - 2);
+                }
+                if (_itemsPanle.Children.Count > 0)
+                    (_itemsPanle.Children[_itemsPanle.Children.Count - 1] as ListBox).BorderThickness = new Thickness(0);
+                if (_itemsPanle.Children.Count > 1)
+                    (_itemsPanle.Children[_itemsPanle.Children.Count - 2] as ListBox).BorderThickness = new Thickness(0, 0, 1, 0);
+            }
+        }
+
+
+
+        private void Border_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
+        {
+            IsDropDownOpen = !IsDropDownOpen;
+        }
+
+        private string GetParentNames(CascaderItem model)
+        {
+            if (model is null)
+                return string.Empty;
+            string text = model.DisplayName;
+            CascaderItem tree = model;
+            do
+            {
+                tree = tree.ParentTree;
+                text = tree.DisplayName + "/" + text;
+            } while (tree.ParentTree != null);
+            return text;
+        }
+    }
+}
diff --git a/SmartUI/Controls/CascaderItem.cs b/SmartUI/Controls/CascaderItem.cs
new file mode 100644
index 0000000000000000000000000000000000000000..155fd37cfe49573fae88441743e584ac55b6cee1
--- /dev/null
+++ b/SmartUI/Controls/CascaderItem.cs
@@ -0,0 +1,63 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+
+namespace SmartUI.Base
+{
+    public class CascaderItem : ContentControl
+    {
+
+        public string DisplayName
+        {
+            get { return (string)GetValue(DisplayNameProperty); }
+            set { SetValue(DisplayNameProperty, value); }
+        }
+
+        public static readonly DependencyProperty DisplayNameProperty =
+            DependencyProperty.Register(nameof(DisplayName), typeof(string), typeof(CascaderItem));
+
+
+
+        public object Data
+        {
+            get { return (object)GetValue(DataProperty); }
+            set { SetValue(DataProperty, value); }
+        }
+
+        public static readonly DependencyProperty DataProperty =
+            DependencyProperty.Register(nameof(Data), typeof(object), typeof(CascaderItem));
+
+
+
+
+        public bool IsChecked
+        {
+            get { return (bool)GetValue(IsCheckedProperty); }
+            set { SetValue(IsCheckedProperty, value); }
+        }
+
+        public static readonly DependencyProperty IsCheckedProperty =
+            DependencyProperty.Register(nameof(IsChecked), typeof(bool), typeof(CascaderItem), new PropertyMetadata(false));
+
+
+
+        public ObservableCollection<CascaderItem> Children
+        {
+            get { return (ObservableCollection<CascaderItem>)GetValue(ChildrenProperty); }
+            set { SetValue(ChildrenProperty, value); }
+        }
+
+        public static readonly DependencyProperty ChildrenProperty =
+            DependencyProperty.Register(nameof(Children), typeof(ObservableCollection<CascaderItem>), typeof(CascaderItem));
+
+        internal CascaderItem ParentTree { get; set; }
+
+
+    }
+}
diff --git a/SmartUI/SmartUI.csproj b/SmartUI/SmartUI.csproj
index 1326a12c238912ed57a44d388408a002f9261e8b..d933606a3231abc76151e37039bf56a068e15411 100644
--- a/SmartUI/SmartUI.csproj
+++ b/SmartUI/SmartUI.csproj
@@ -76,6 +76,8 @@
   <ItemGroup>
     <Compile Include="Assist\ButtonAssist.cs" />
     <Compile Include="Assist\DataGridAssist.cs" />
+    <Compile Include="Controls\CascaderItem.cs" />
+    <Compile Include="Controls\Cascader.cs" />
     <Compile Include="Controls\ChildWindow.cs" />
     <Compile Include="Controls\ComboBoxControl.cs" />
     <Compile Include="Controls\DateTimePicker.cs" />
@@ -110,6 +112,10 @@
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
     </Page>
+    <Page Include="Themes\CascaderStyle.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </Page>
     <Page Include="Themes\SwitchStyle.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
@@ -183,5 +189,8 @@
   <ItemGroup>
     <None Include="packages.config" />
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Base\" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>
\ No newline at end of file
diff --git a/SmartUI/Themes/CascaderStyle.xaml b/SmartUI/Themes/CascaderStyle.xaml
new file mode 100644
index 0000000000000000000000000000000000000000..6fe30b0f7214824c90d0f54a352dd29968af1b6e
--- /dev/null
+++ b/SmartUI/Themes/CascaderStyle.xaml
@@ -0,0 +1,99 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:smart="clr-namespace:SmartUI.Controls"
+                    xmlns:base="clr-namespace:SmartUI.Base"
+                    xmlns:c="clr-namespace:CalcBinding;assembly=CalcBinding">
+    <Style x:Key="CascaderDefaultStyle" TargetType="{x:Type smart:Cascader}">
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBorderGaryColor}"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
+        <Setter Property="Width" Value="150"/>
+        <Setter Property="Height" Value="35"/>
+        <Setter Property="Margin" Value="0 3"/>
+        <Setter Property="Foreground" Value="{DynamicResource PrimaryTextColor}"/>
+        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto" />
+        <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
+        <Setter Property="Padding" Value="2" />
+        <Setter Property="VerticalContentAlignment" Value="Top" />
+        <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
+        <Setter Property="HorizontalAlignment" Value="Stretch"/>
+        <Setter Property="VerticalAlignment" Value="Center"/>
+        <Setter Property="ScrollViewer.CanContentScroll" Value="True" />
+        <Setter Property="ScrollViewer.PanningMode" Value="Both" />
+        <Setter Property="Stylus.IsFlicksEnabled" Value="False" />
+        <Setter Property="IsDropDownOpen" Value="False"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="{x:Type smart:Cascader}">
+                    <Grid>
+                        <Border x:Name="border" Background="White" Margin="0 0 5 0" ToolTip="{TemplateBinding Text}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="4">
+                            <DockPanel LastChildFill="True" VerticalAlignment="Center" Cursor="Hand">
+                                <smart:PackIcon x:Name="icon" DockPanel.Dock="Right" Width="16" Height="16" Kind="KeyboardArrowDown" Foreground="{TemplateBinding BorderBrush}" Margin="5"/>
+                                <TextBlock Text="{TemplateBinding Text}" Margin="5 0" VerticalAlignment="Center"/>
+                            </DockPanel>
+                        </Border>
+                        <Popup x:Name="popup" IsOpen="{TemplateBinding IsDropDownOpen}" MinWidth="150" Height="Auto" HorizontalAlignment="Left" VerticalOffset="1" MinHeight="100" MaxHeight="300" AllowsTransparency="True">
+                            <Border Background="White" CornerRadius="4" Padding="1 0" Margin="0" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="1">
+                                <Border.Effect>
+                                    <DropShadowEffect Color="LightGray" Opacity="0.3"/>
+                                </Border.Effect>
+                                <StackPanel x:Name="Pack_items" Orientation="Horizontal">
+                                    <StackPanel.Resources>
+                                        <Style TargetType="ListBox">
+                                            <Setter Property="Width" Value="140"/>
+                                            <Setter Property="Height" Value="{Binding ElementName=popup,Path=Height}"/>
+                                            <Setter Property="BorderBrush" Value="{DynamicResource BorderBaseColor}"/>
+                                            <Setter Property="BorderThickness" Value="0"/>
+                                            <Setter Property="SelectionMode" Value="Single"/>
+                                            <Setter Property="ItemsPanel">
+                                                <Setter.Value>
+                                                    <ItemsPanelTemplate>
+                                                        <StackPanel Orientation="Vertical"/>
+                                                    </ItemsPanelTemplate>
+                                                </Setter.Value>
+                                            </Setter>
+                                        </Style>
+                                        <Style TargetType="ListBoxItem">
+                                            <Setter Property="Template">
+                                                <Setter.Value>
+                                                    <ControlTemplate>
+                                                        <DockPanel x:Name="dock" LastChildFill="True" Height="30">
+                                                            <smart:PackIcon x:Name="icon" Kind="KeyboardArrowRight" DockPanel.Dock="Right" Width="16" Height="16" VerticalAlignment="Center" Margin="5 0"/>
+                                                            <Label Name="lable" Foreground="{DynamicResource PrimaryTextColor}" IsHitTestVisible="True" Content="{Binding DisplayName}" Padding="5 0"/>
+                                                        </DockPanel>
+                                                        <ControlTemplate.Triggers>
+                                                            <Trigger SourceName="dock" Property="IsMouseOver" Value="True">
+                                                                <Setter TargetName="dock" Property="Background" Value="{DynamicResource BgHoverColor}"/>
+                                                            </Trigger>
+                                                            <DataTrigger Binding="{Binding Children.Count}" Value="0">
+                                                                <Setter TargetName="icon" Property="Visibility" Value="Collapsed"/>
+                                                            </DataTrigger>
+                                                            <DataTrigger Binding="{Binding Children}" Value="{x:Null}">
+                                                                <Setter TargetName="icon" Property="Visibility" Value="Collapsed"/>
+                                                            </DataTrigger>
+                                                            <DataTrigger Binding="{Binding IsChecked}" Value="True">
+                                                                <Setter TargetName="lable" Property="Foreground" Value="{DynamicResource BrandColor}"/>
+                                                                <Setter TargetName="icon" Property="Foreground" Value="{DynamicResource BrandColor}"/>
+                                                            </DataTrigger>
+                                                        </ControlTemplate.Triggers>
+                                                    </ControlTemplate>
+                                                </Setter.Value>
+                                            </Setter>
+                                        </Style>
+                                    </StackPanel.Resources>
+                                </StackPanel>
+                            </Border>
+                        </Popup>
+                    </Grid>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="IsDropDownOpen" Value="True">
+                            <Setter TargetName="icon" Property="Kind" Value="KeyboardArrowUp"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+    <Style TargetType="{x:Type smart:Cascader}" BasedOn="{StaticResource CascaderDefaultStyle}"/>
+</ResourceDictionary>
\ No newline at end of file
diff --git a/SmartUI/Themes/Color.xaml b/SmartUI/Themes/Color.xaml
index ad687ca4c75cd1cd29bbc4f1a7c32601fa34cd07..48cbd6099439313e2dc83f3ba57d34e3a1f64e96 100644
--- a/SmartUI/Themes/Color.xaml
+++ b/SmartUI/Themes/Color.xaml
@@ -21,6 +21,6 @@
     <SolidColorBrush x:Key="BgBlackColor" Color="#000000"/>
     <SolidColorBrush x:Key="BgWhiteColor" Color="#FFFFFF"/>
     <SolidColorBrush x:Key="BgTransparentColor" Color="Transparent"/>
-
+    <SolidColorBrush x:Key="BgHoverColor" Color="#FAFAFA"/>
     <SolidColorBrush x:Key="TextEnabledColor" Color="#C0C4CC"/>
 </ResourceDictionary>
\ No newline at end of file
diff --git a/SmartUI/Themes/ComboBoxStyle.xaml b/SmartUI/Themes/ComboBoxStyle.xaml
index 75d8f184a1bd0864299b3bb57f3ef46fd70ab517..5ea596363a6c835f9f2102af9199eaa91e56f0bb 100644
--- a/SmartUI/Themes/ComboBoxStyle.xaml
+++ b/SmartUI/Themes/ComboBoxStyle.xaml
@@ -28,7 +28,7 @@
                     <Grid>
                         <Border x:Name="border" Background="White" Margin="0 0 5 0" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="4">
                           <DockPanel LastChildFill="True" VerticalAlignment="Center" Cursor="Hand">
-                                <smart:PackIcon x:Name="icon" DockPanel.Dock="Right" Width="24" Height="24" Kind="KeyboardArrowDown" Foreground="{TemplateBinding BorderBrush}"/>
+                                <smart:PackIcon x:Name="icon" DockPanel.Dock="Right" Width="16" Height="16" Kind="KeyboardArrowDown" Foreground="{TemplateBinding BorderBrush}" Margin="5"/>
                                 <TextBlock Text="{TemplateBinding Text}" Margin="5 0" VerticalAlignment="Center"/>
                           </DockPanel>
                         </Border>
@@ -37,7 +37,7 @@
                                 <Border.Effect>
                                     <DropShadowEffect Color="LightGray" Opacity="0.3"/>
                                 </Border.Effect>
-                                <ScrollViewer HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Visible" CanContentScroll="True">
+                                <ScrollViewer HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Auto" CanContentScroll="True">
                                     <ItemsPresenter SnapsToDevicePixels="True"/>
                                 </ScrollViewer>                                
                             </Border>
@@ -73,7 +73,7 @@
     <Style TargetType="ComboBoxItem">
         <Setter Property="Width" Value="Auto"/>
         <Setter Property="Height" Value="30"/>
-        <Setter Property="Padding" Value="10 3"/>
+        <Setter Property="Padding" Value="3"/>
         <Setter Property="VerticalContentAlignment" Value="Center"/>
         <Setter Property="Template">
             <Setter.Value>
@@ -83,7 +83,7 @@
                     </Border>
                     <ControlTemplate.Triggers>
                         <Trigger Property="IsMouseOver" Value="True">
-                            <Setter Property="Background" Value="#FAFAFA"/>
+                            <Setter Property="Background" Value="{DynamicResource BgHoverColor}"/>
                         </Trigger>
                     </ControlTemplate.Triggers>
                 </ControlTemplate>
diff --git a/SmartUI/Themes/Default.xaml b/SmartUI/Themes/Default.xaml
index 4e5bb63ccc127e63820fa91a43b9cd7eff88d9a4..5989d60695d449e4e90025e0cb1c06aa265784ea 100644
--- a/SmartUI/Themes/Default.xaml
+++ b/SmartUI/Themes/Default.xaml
@@ -18,5 +18,6 @@
         <ResourceDictionary Source="pack://application:,,,/SmartUI;component/Themes/CheckBoxStyle.xaml" />
         <ResourceDictionary Source="pack://application:,,,/SmartUI;component/Themes/TextBlockStyle.xaml" />
         <ResourceDictionary Source="pack://application:,,,/SmartUI;component/Themes/SwitchStyle.xaml" />
+        <ResourceDictionary Source="pack://application:,,,/SmartUI;component/Themes/CascaderStyle.xaml" />
     </ResourceDictionary.MergedDictionaries>
 </ResourceDictionary>
\ No newline at end of file
diff --git a/SmartUI/Themes/SwitchStyle.xaml b/SmartUI/Themes/SwitchStyle.xaml
index abe1695543825f46c3d9ea6ab2dfa85df79b8684..ccf37b663c1614e7cf06893fa9f8bb847811baaa 100644
--- a/SmartUI/Themes/SwitchStyle.xaml
+++ b/SmartUI/Themes/SwitchStyle.xaml
@@ -18,8 +18,7 @@
                         </Border>
                         <TextBlock x:Name="untext" Text="{TemplateBinding UnCheckText}" FontSize="{TemplateBinding FontSize}" Foreground="{TemplateBinding Background}"/>
                         <TextBlock x:Name="texted" Text="{TemplateBinding CheckedText}" FontSize="{TemplateBinding FontSize}" Visibility="Collapsed" Foreground="{DynamicResource SuccessColor}"/>
-                    </WrapPanel>
-                    
+                    </WrapPanel>                    
                     <ControlTemplate.Triggers>
                         <Trigger Property="IsChecked" Value="True">
                             <Setter TargetName="border" Property="HorizontalAlignment" Value="Right"/>