diff --git a/demo/Semi.Avalonia.Demo/Pages/DataValidationErrorsDemo.axaml b/demo/Semi.Avalonia.Demo/Pages/DataValidationErrorsDemo.axaml
new file mode 100644
index 0000000..a8e1101
--- /dev/null
+++ b/demo/Semi.Avalonia.Demo/Pages/DataValidationErrorsDemo.axaml
@@ -0,0 +1,83 @@
+<UserControl
+    x:Class="Semi.Avalonia.Demo.Pages.DataValidationErrorsDemo"
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:system="clr-namespace:System;assembly=netstandard"
+    d:DesignHeight="450"
+    d:DesignWidth="800"
+    mc:Ignorable="d">
+    <ScrollViewer>
+        <StackPanel HorizontalAlignment="Left" Spacing="20">
+            <AutoCompleteBox Width="300">
+                <DataValidationErrors.Error>
+                    <system:Exception />
+                </DataValidationErrors.Error>
+            </AutoCompleteBox>
+            <AutoCompleteBox Width="300" Classes="Large">
+                <DataValidationErrors.Error>
+                    <system:Exception />
+                </DataValidationErrors.Error>
+            </AutoCompleteBox>
+            <AutoCompleteBox Width="300" Classes="Small">
+                <DataValidationErrors.Error>
+                    <system:Exception />
+                </DataValidationErrors.Error>
+            </AutoCompleteBox>
+            <CalendarDatePicker Width="300">
+                <DataValidationErrors.Error>
+                    <system:Exception />
+                </DataValidationErrors.Error>
+            </CalendarDatePicker>
+            <ComboBox Width="300">
+                <ComboBoxItem>AAA</ComboBoxItem>
+                <ComboBoxItem>BBB</ComboBoxItem>
+                <DataValidationErrors.Error>
+                    <system:Exception />
+                </DataValidationErrors.Error>
+            </ComboBox>
+            <DatePicker Width="300">
+                <DataValidationErrors.Error>
+                    <system:Exception />
+                </DataValidationErrors.Error>
+            </DatePicker>
+            <NumericUpDown Width="300">
+                <DataValidationErrors.Error>
+                    <system:Exception />
+                </DataValidationErrors.Error>
+            </NumericUpDown>
+            <Slider Width="300">
+                <DataValidationErrors.Error>
+                    <system:Exception />
+                </DataValidationErrors.Error>
+            </Slider>
+            <TimePicker Width="300">
+                <DataValidationErrors.Error>
+                    <system:Exception />
+                </DataValidationErrors.Error>
+            </TimePicker>
+            <TextBox
+                Width="300"
+                InnerLeftContent="http://"
+                InnerRightContent=".com">
+                <DataValidationErrors.Error>
+                    <system:Exception />
+                </DataValidationErrors.Error>
+            </TextBox>
+            <TextBox
+                Width="300"
+                InnerLeftContent="http://"
+                InnerRightContent=".com">
+                <TextBox.Styles>
+                    <Style Selector="TextBox /template/ DataValidationErrors">
+                        <Setter Property="Theme" Value="{DynamicResource TooltipDataValidationErrors}" />
+                    </Style>
+                </TextBox.Styles>
+                <DataValidationErrors.Error>
+                    <system:Exception />
+                </DataValidationErrors.Error>
+            </TextBox>
+        </StackPanel>
+    </ScrollViewer>
+</UserControl>
diff --git a/demo/Semi.Avalonia.Demo/Pages/DataValidationErrorsDemo.axaml.cs b/demo/Semi.Avalonia.Demo/Pages/DataValidationErrorsDemo.axaml.cs
new file mode 100644
index 0000000..b012533
--- /dev/null
+++ b/demo/Semi.Avalonia.Demo/Pages/DataValidationErrorsDemo.axaml.cs
@@ -0,0 +1,18 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace Semi.Avalonia.Demo.Pages;
+
+public partial class DataValidationErrorsDemo : UserControl
+{
+    public DataValidationErrorsDemo()
+    {
+        InitializeComponent();
+    }
+
+    private void InitializeComponent()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+}
\ No newline at end of file
diff --git a/demo/Semi.Avalonia.Demo/Pages/TextBoxDemo.axaml b/demo/Semi.Avalonia.Demo/Pages/TextBoxDemo.axaml
index a181a61..b12fa1f 100644
--- a/demo/Semi.Avalonia.Demo/Pages/TextBoxDemo.axaml
+++ b/demo/Semi.Avalonia.Demo/Pages/TextBoxDemo.axaml
@@ -4,6 +4,7 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    xmlns:system="clr-namespace:System;assembly=netstandard"
     d:DesignHeight="450"
     d:DesignWidth="800"
     mc:Ignorable="d">
diff --git a/demo/Semi.Avalonia.Demo/Views/MainView.axaml b/demo/Semi.Avalonia.Demo/Views/MainView.axaml
index 1e517fc..39aa54d 100644
--- a/demo/Semi.Avalonia.Demo/Views/MainView.axaml
+++ b/demo/Semi.Avalonia.Demo/Views/MainView.axaml
@@ -105,6 +105,9 @@
             <TabItem Header="ComboBox">
                 <pages:ComboBoxDemo />
             </TabItem>
+            <TabItem Header="DataValidationErrors">
+                <pages:DataValidationErrorsDemo />
+            </TabItem>
             <TabItem Header="DataGrid">
                 <pages:DataGridDemo />
             </TabItem>
diff --git a/src/Semi.Avalonia.DataGrid/DataGrid.axaml b/src/Semi.Avalonia.DataGrid/DataGrid.axaml
index 50373a3..9087751 100644
--- a/src/Semi.Avalonia.DataGrid/DataGrid.axaml
+++ b/src/Semi.Avalonia.DataGrid/DataGrid.axaml
@@ -14,6 +14,13 @@
         BasedOn="{StaticResource {x:Type TextBox}}"
         TargetType="TextBox">
         <Setter Property="VerticalAlignment" Value="Stretch" />
+        <Setter Property="MinHeight" Value="20" />
+        <Style Selector="^ /template/ Border#PART_ContentPresenterBorder">
+            <Setter Property="MinHeight" Value="20" />
+        </Style>
+        <Style Selector="^:error:focus /template/ Border#PART_ContentPresenterBorder">
+            <Setter Property="Border.BorderBrush" Value="Transparent" />
+        </Style>
         <Style Selector="^ /template/ DataValidationErrors">
             <Setter Property="Theme" Value="{DynamicResource TooltipDataValidationErrors}" />
         </Style>
diff --git a/src/Semi.Avalonia/Controls/AutoCompleteBox.axaml b/src/Semi.Avalonia/Controls/AutoCompleteBox.axaml
index 93f6747..18110f5 100644
--- a/src/Semi.Avalonia/Controls/AutoCompleteBox.axaml
+++ b/src/Semi.Avalonia/Controls/AutoCompleteBox.axaml
@@ -12,35 +12,38 @@
         <Setter Property="AutoCompleteBox.MaxDropDownHeight" Value="{DynamicResource AutoCompleteMaxDropdownHeight}" />
         <Setter Property="Template">
             <ControlTemplate TargetType="AutoCompleteBox">
-                <Panel>
-                    <TextBox
-                        Name="PART_TextBox"
-                        VerticalAlignment="Center"
-                        DataValidationErrors.Errors="{TemplateBinding (DataValidationErrors.Errors)}"
-                        Watermark="{TemplateBinding Watermark}" />
-                    <Popup
-                        Name="PART_Popup"
-                        MinWidth="{Binding Bounds.Width, RelativeSource={RelativeSource TemplatedParent}}"
-                        MaxHeight="{TemplateBinding MaxDropDownHeight}"
-                        IsLightDismissEnabled="True"
-                        PlacementTarget="{TemplateBinding}">
-                        <Border
-                            Margin="{DynamicResource AutoCompleteBoxPopupMargin}"
-                            HorizontalAlignment="Stretch"
-                            Background="{DynamicResource AutoCompleteBoxPopupBackground}"
-                            BorderBrush="{DynamicResource AutoCompleteBoxPopupBorderBrush}"
-                            BorderThickness="{DynamicResource AutoCompleteBoxPopupBorderThickness}"
-                            BoxShadow="{DynamicResource AutoCompleteBoxPopupBoxShadow}"
-                            CornerRadius="{DynamicResource AutoCompleteBoxPopupCornerRadius}">
-                            <ListBox
-                                Name="PART_SelectingItemsControl"
-                                Foreground="{TemplateBinding Foreground}"
-                                ItemTemplate="{TemplateBinding ItemTemplate}"
-                                ScrollViewer.HorizontalScrollBarVisibility="Auto"
-                                ScrollViewer.VerticalScrollBarVisibility="Auto" />
-                        </Border>
-                    </Popup>
-                </Panel>
+                <DataValidationErrors>
+                    <Panel>
+                        <TextBox
+                            Name="PART_TextBox"
+                            VerticalAlignment="Center"
+                            DataValidationErrors.Errors="{TemplateBinding (DataValidationErrors.Errors)}"
+                            Theme="{DynamicResource NonErrorTextBox}"
+                            Watermark="{TemplateBinding Watermark}" />
+                        <Popup
+                            Name="PART_Popup"
+                            MinWidth="{Binding Bounds.Width, RelativeSource={RelativeSource TemplatedParent}}"
+                            MaxHeight="{TemplateBinding MaxDropDownHeight}"
+                            IsLightDismissEnabled="True"
+                            PlacementTarget="{TemplateBinding}">
+                            <Border
+                                Margin="{DynamicResource AutoCompleteBoxPopupMargin}"
+                                HorizontalAlignment="Stretch"
+                                Background="{DynamicResource AutoCompleteBoxPopupBackground}"
+                                BorderBrush="{DynamicResource AutoCompleteBoxPopupBorderBrush}"
+                                BorderThickness="{DynamicResource AutoCompleteBoxPopupBorderThickness}"
+                                BoxShadow="{DynamicResource AutoCompleteBoxPopupBoxShadow}"
+                                CornerRadius="{DynamicResource AutoCompleteBoxPopupCornerRadius}">
+                                <ListBox
+                                    Name="PART_SelectingItemsControl"
+                                    Foreground="{TemplateBinding Foreground}"
+                                    ItemTemplate="{TemplateBinding ItemTemplate}"
+                                    ScrollViewer.HorizontalScrollBarVisibility="Auto"
+                                    ScrollViewer.VerticalScrollBarVisibility="Auto" />
+                            </Border>
+                        </Popup>
+                    </Panel>
+                </DataValidationErrors>
             </ControlTemplate>
         </Setter>
 
diff --git a/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml b/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml
index 5ba39d2..566d2ab 100644
--- a/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml
+++ b/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml
@@ -34,107 +34,108 @@
         <Setter Property="VerticalAlignment" Value="Center" />
         <Setter Property="HorizontalContentAlignment" Value="Left" />
         <Setter Property="VerticalContentAlignment" Value="Center" />
-        <Setter Property="CalendarDatePicker.MinHeight" Value="{DynamicResource CalendarDatePickerDefaultHeight}" />
         <Setter Property="Padding" Value="8 0" />
         <Setter Property="Template">
             <ControlTemplate TargetType="CalendarDatePicker">
-                <Panel
-                    x:Name="LayoutRoot"
-                    HorizontalAlignment="Stretch"
-                    VerticalAlignment="Stretch">
-                    <Border
-                        x:Name="Background"
-                        Background="{TemplateBinding Background}"
-                        BorderBrush="{TemplateBinding BorderBrush}"
-                        BorderThickness="{TemplateBinding BorderThickness}"
-                        CornerRadius="{TemplateBinding CornerRadius}">
-                        <Grid
-                            HorizontalAlignment="Stretch"
-                            VerticalAlignment="Center"
-                            ColumnDefinitions="*,Auto">
-                            <TextBox
-                                Name="PART_TextBox"
-                                Grid.Column="0"
-                                MinHeight="{DynamicResource CalendarDatePickerInnerDefaultHeight}"
+                <DataValidationErrors>
+                    <Panel
+                        x:Name="LayoutRoot"
+                        HorizontalAlignment="Stretch"
+                        VerticalAlignment="Stretch">
+                        <Border
+                            x:Name="Background"
+                            Background="{TemplateBinding Background}"
+                            BorderBrush="{TemplateBinding BorderBrush}"
+                            BorderThickness="{TemplateBinding BorderThickness}"
+                            CornerRadius="{TemplateBinding CornerRadius}">
+                            <Grid
                                 HorizontalAlignment="Stretch"
                                 VerticalAlignment="Center"
-                                HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
-                                VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
-                                Background="Transparent"
-                                BorderBrush="Transparent"
-                                BorderThickness="0"
-                                CornerRadius="{TemplateBinding CornerRadius}"
-                                Foreground="{TemplateBinding Foreground}"
-                                UseFloatingWatermark="{TemplateBinding UseFloatingWatermark}"
-                                Watermark="{TemplateBinding Watermark}">
-                                <TextBox.Styles>
-                                    <Style Selector="TextBox#PART_TextBox:pointerover /template/ Border#PART_ContentPresenterBorder">
-                                        <!--  By default the TextBox has its own focused state, override this to disable it here  -->
-                                        <Setter Property="Background" Value="Transparent" />
-                                        <Setter Property="BorderBrush" Value="Transparent" />
-                                        <Setter Property="BorderThickness" Value="0" />
-                                    </Style>
-                                    <Style Selector="TextBox#PART_TextBox:focus /template/ Border#PART_ContentPresenterBorder">
-                                        <!--  By default the TextBox has its own focused state, override this to disable it here  -->
-                                        <Setter Property="Background" Value="Transparent" />
-                                        <Setter Property="BorderBrush" Value="Transparent" />
-                                        <Setter Property="BorderThickness" Value="0" />
-                                    </Style>
-                                    <Style Selector="TextBox#PART_TextBox:disabled">
-                                        <Style Selector="^ /template/ Border#PART_ContentPresenterBorder">
-                                            <!--  By default the TextBox has its own disabled state, override this to make the border background show through  -->
+                                ColumnDefinitions="*,Auto">
+                                <TextBox
+                                    Name="PART_TextBox"
+                                    Grid.Column="0"
+                                    MinHeight="{DynamicResource CalendarDatePickerDefaultHeight}"
+                                    HorizontalAlignment="Stretch"
+                                    VerticalAlignment="Center"
+                                    HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
+                                    VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
+                                    Background="Transparent"
+                                    BorderBrush="Transparent"
+                                    BorderThickness="0"
+                                    CornerRadius="{TemplateBinding CornerRadius}"
+                                    Foreground="{TemplateBinding Foreground}"
+                                    Theme="{DynamicResource NonErrorTextBox}"
+                                    UseFloatingWatermark="{TemplateBinding UseFloatingWatermark}"
+                                    Watermark="{TemplateBinding Watermark}">
+                                    <TextBox.Styles>
+                                        <Style Selector="TextBox#PART_TextBox:pointerover /template/ Border#PART_ContentPresenterBorder">
+                                            <!--  By default the TextBox has its own focused state, override this to disable it here  -->
                                             <Setter Property="Background" Value="Transparent" />
                                             <Setter Property="BorderBrush" Value="Transparent" />
+                                            <Setter Property="BorderThickness" Value="0" />
                                         </Style>
-                                    </Style>
-                                </TextBox.Styles>
-                            </TextBox>
-                            <Button
-                                Name="PART_Button"
-                                Grid.Column="1"
-                                Padding="0,0,8,0"
-                                Cursor="Hand"
-                                Focusable="False"
-                                Theme="{DynamicResource CalendarDatePickerButton}" />
-                            <Popup
-                                Name="PART_Popup"
-                                HorizontalOffset="-8"
-                                IsLightDismissEnabled="True"
-                                PlacementTarget="{TemplateBinding}"
-                                VerticalOffset="-4">
-                                <Border
-                                    Margin="8"
-                                    Background="Transparent"
-                                    BoxShadow="{DynamicResource CalendarDatePickerPopupBoxShadows}"
-                                    CornerRadius="{DynamicResource CalendarCornerRadius}">
-                                    <Calendar
-                                        Name="PART_Calendar"
-                                        BorderThickness="0"
-                                        CornerRadius="{Binding $parent[Border].CornerRadius}"
-                                        DisplayDate="{TemplateBinding DisplayDate}"
-                                        DisplayDateEnd="{TemplateBinding DisplayDateEnd}"
-                                        DisplayDateStart="{TemplateBinding DisplayDateStart}"
-                                        FirstDayOfWeek="{TemplateBinding FirstDayOfWeek}"
-                                        IsTodayHighlighted="{TemplateBinding IsTodayHighlighted}"
-                                        SelectedDate="{TemplateBinding SelectedDate,
-                                                                       Mode=TwoWay}" />
-                                </Border>
-                            </Popup>
-                        </Grid>
-                    </Border>
+                                        <Style Selector="TextBox#PART_TextBox:focus /template/ Border#PART_ContentPresenterBorder">
+                                            <!--  By default the TextBox has its own focused state, override this to disable it here  -->
+                                            <Setter Property="Background" Value="Transparent" />
+                                            <Setter Property="BorderBrush" Value="Transparent" />
+                                            <Setter Property="BorderThickness" Value="0" />
+                                        </Style>
+                                        <Style Selector="TextBox#PART_TextBox:disabled">
+                                            <Style Selector="^ /template/ Border#PART_ContentPresenterBorder">
+                                                <!--  By default the TextBox has its own disabled state, override this to make the border background show through  -->
+                                                <Setter Property="Background" Value="Transparent" />
+                                                <Setter Property="BorderBrush" Value="Transparent" />
+                                            </Style>
+                                        </Style>
+                                    </TextBox.Styles>
+                                </TextBox>
+                                <Button
+                                    Name="PART_Button"
+                                    Grid.Column="1"
+                                    Padding="0,0,8,0"
+                                    Cursor="Hand"
+                                    Focusable="False"
+                                    Theme="{DynamicResource CalendarDatePickerButton}" />
+                                <Popup
+                                    Name="PART_Popup"
+                                    HorizontalOffset="-8"
+                                    IsLightDismissEnabled="True"
+                                    PlacementTarget="{TemplateBinding}"
+                                    VerticalOffset="-4">
+                                    <Border
+                                        Margin="8"
+                                        Background="Transparent"
+                                        BoxShadow="{DynamicResource CalendarDatePickerPopupBoxShadows}"
+                                        CornerRadius="{DynamicResource CalendarCornerRadius}">
+                                        <Calendar
+                                            Name="PART_Calendar"
+                                            BorderThickness="0"
+                                            CornerRadius="{Binding $parent[Border].CornerRadius}"
+                                            DisplayDate="{TemplateBinding DisplayDate}"
+                                            DisplayDateEnd="{TemplateBinding DisplayDateEnd}"
+                                            DisplayDateStart="{TemplateBinding DisplayDateStart}"
+                                            FirstDayOfWeek="{TemplateBinding FirstDayOfWeek}"
+                                            IsTodayHighlighted="{TemplateBinding IsTodayHighlighted}"
+                                            SelectedDate="{TemplateBinding SelectedDate,
+                                                                           Mode=TwoWay}" />
+                                    </Border>
+                                </Popup>
+                            </Grid>
+                        </Border>
+
+                    </Panel>
+                </DataValidationErrors>
 
-                </Panel>
             </ControlTemplate>
         </Setter>
 
         <Style Selector="^.Large">
-            <Setter Property="CalendarDatePicker.MinHeight" Value="{DynamicResource CalendarDatePickerLargeHeight}" />
             <Style Selector="^ /template/ TextBox#PART_TextBox">
                 <Setter Property="TextBox.MinHeight" Value="{DynamicResource CalendarDatePickerInnerLargeHeight}" />
             </Style>
         </Style>
         <Style Selector="^.Small">
-            <Setter Property="CalendarDatePicker.MinHeight" Value="{DynamicResource CalendarDatePickerSmallHeight}" />
             <Style Selector="^ /template/ TextBox#PART_TextBox">
                 <Setter Property="TextBox.MinHeight" Value="{DynamicResource CalendarDatePickerInnerSmallHeight}" />
             </Style>
@@ -166,6 +167,25 @@
             <Setter Property="BorderBrush" Value="{DynamicResource CalendarDatePickerFocusBorderBrush}" />
         </Style>
 
+        <Style Selector="^:error">
+            <Style Selector="^ /template/ Border#Background">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:pointerover /template/ Border#Background">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsPointerOverBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:pressed /template/ Border#Background">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsPressedBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:focus-within /template/ Border#Background">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsSelectedBackground}" />
+                <Setter Property="BorderBrush" Value="{DynamicResource DataValidationErrorsSelectedBorderBrush}" />
+            </Style>
+        </Style>
+
         <Style Selector="^.Bordered">
             <Style Selector="^ Border#Background">
                 <Setter Property="Border.Background" Value="{DynamicResource CalendarDatePickerBorderedDefaultBackground}" />
@@ -189,6 +209,24 @@
                     <Setter Property="Foreground" Value="{DynamicResource CalendarDatePickerDisabledIconForeground}" />
                 </Style>
             </Style>
+            <Style Selector="^:error">
+                <Style Selector="^ /template/ Border#Background">
+                    <Setter Property="Background" Value="{DynamicResource DataValidationErrorsBackground}" />
+                    <Setter Property="BorderBrush" Value="{DynamicResource DataValidationErrorsBorderBrush}" />
+                </Style>
+                <Style Selector="^:pointerover /template/ Border#Background">
+                    <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsPointerOverBackground}" />
+                    <Setter Property="Border.BorderBrush" Value="{DynamicResource DataValidationErrorsPointerOverBorderBrush}" />
+                </Style>
+                <Style Selector="^:pressed /template/ Border#Background">
+                    <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsPressedBackground}" />
+                    <Setter Property="Border.BorderBrush" Value="{DynamicResource DataValidationErrorsPressedBorderBrush}" />
+                </Style>
+                <Style Selector="^:focus-within /template/ Border#Background">
+                    <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsSelectedBackground}" />
+                    <Setter Property="Border.BorderBrush" Value="{DynamicResource DataValidationErrorsSelectedBorderBrush}" />
+                </Style>
+            </Style>
         </Style>
     </ControlTheme>
 </ResourceDictionary>
diff --git a/src/Semi.Avalonia/Controls/ComboBox.axaml b/src/Semi.Avalonia/Controls/ComboBox.axaml
index 6e27881..4692226 100644
--- a/src/Semi.Avalonia/Controls/ComboBox.axaml
+++ b/src/Semi.Avalonia/Controls/ComboBox.axaml
@@ -36,7 +36,6 @@
         <Setter Property="CornerRadius" Value="{DynamicResource ComboBoxSelectorCornerRadius}" />
         <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Disabled" />
         <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
-        <Setter Property="MinHeight" Value="{DynamicResource ComboBoxDefaultHeight}" />
         <Setter Property="HorizontalContentAlignment" Value="Left" />
         <Setter Property="VerticalContentAlignment" Value="Center" />
         <Setter Property="HorizontalAlignment" Value="Left" />
@@ -45,96 +44,99 @@
         <Setter Property="PlaceholderForeground" Value="{DynamicResource ComboBoxPlaceHolderForeground}" />
         <Setter Property="Template">
             <ControlTemplate TargetType="ComboBox">
-                <Grid ColumnDefinitions="*,32">
-                    <Border
-                        x:Name="Background"
-                        Grid.Column="0"
-                        Grid.ColumnSpan="2"
-                        MinWidth="{DynamicResource ComboBoxThemeMinWidth}"
-                        Background="{TemplateBinding Background}"
-                        BorderBrush="{TemplateBinding BorderBrush}"
-                        BorderThickness="{TemplateBinding BorderThickness}"
-                        CornerRadius="{TemplateBinding CornerRadius}" />
-                    <TextBlock
-                        x:Name="PlaceholderTextBlock"
-                        Grid.Column="0"
-                        Margin="{TemplateBinding Padding}"
-                        HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
-                        VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
-                        Foreground="{TemplateBinding Foreground}"
-                        IsVisible="{TemplateBinding SelectionBoxItem,
-                                                    Converter={x:Static ObjectConverters.IsNull}}"
-                        Opacity="0.3"
-                        Text="{TemplateBinding PlaceholderText}" />
-                    <ContentPresenter
-                        x:Name="ContentPresenter"
-                        Grid.Column="0"
-                        Margin="{TemplateBinding Padding}"
-                        HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
-                        VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
-                        Content="{TemplateBinding SelectionBoxItem}"
-                        ContentTemplate="{TemplateBinding ItemTemplate}" />
-
-                    <Border
-                        x:Name="DropDownOverlay"
-                        Grid.Column="1"
-                        Width="30"
-                        Margin="0,1,1,1"
-                        HorizontalAlignment="Right"
-                        Background="Transparent"
-                        IsVisible="False" />
-
-                    <PathIcon
-                        x:Name="DropDownGlyph"
-                        Grid.Column="1"
-                        Width="12"
-                        Height="12"
-                        Margin="0,0,10,0"
-                        HorizontalAlignment="Right"
-                        VerticalAlignment="Center"
-                        Data="{DynamicResource ComboBoxIcon}"
-                        Foreground="{DynamicResource ComboBoxIconDefaultForeground}"
-                        IsHitTestVisible="False"
-                        UseLayoutRounding="False" />
-
-                    <Popup
-                        Name="PART_Popup"
-                        Grid.Column="0"
-                        MinWidth="{Binding Bounds.Width, RelativeSource={RelativeSource TemplatedParent}}"
-                        MaxHeight="{TemplateBinding MaxDropDownHeight}"
-                        ClipToBounds="False"
-                        InheritsTransform="True"
-                        IsLightDismissEnabled="True"
-                        IsOpen="{TemplateBinding IsDropDownOpen,
-                                                 Mode=TwoWay}"
-                        PlacementTarget="Background"
-                        WindowManagerAddShadowHint="False">
+                <DataValidationErrors>
+                    <Grid ColumnDefinitions="*,32">
                         <Border
-                            x:Name="PopupBorder"
-                            Margin="0,4"
-                            HorizontalAlignment="Stretch"
-                            Background="{DynamicResource ComboBoxPopupBackground}"
-                            BorderBrush="{DynamicResource ComboBoxPopupBorderBrush}"
-                            BorderThickness="{DynamicResource ComboBoxPopupBorderThickness}"
-                            BoxShadow="{DynamicResource ComboBoxPopupBoxShadow}"
-                            ClipToBounds="True"
-                            CornerRadius="6">
-                            <ScrollViewer HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}" VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}">
-                                <ItemsPresenter
-                                    Name="PART_ItemsPresenter"
-                                    Margin="{DynamicResource ComboBoxDropdownContentMargin}"
-                                    ItemsPanel="{TemplateBinding ItemsPanel}" />
-                            </ScrollViewer>
-                        </Border>
-                    </Popup>
-                </Grid>
+                            x:Name="Background"
+                            Grid.Column="0"
+                            Grid.ColumnSpan="2"
+                            MinHeight="{DynamicResource ComboBoxDefaultHeight}"
+                            MinWidth="{DynamicResource ComboBoxThemeMinWidth}"
+                            Background="{TemplateBinding Background}"
+                            BorderBrush="{TemplateBinding BorderBrush}"
+                            BorderThickness="{TemplateBinding BorderThickness}"
+                            CornerRadius="{TemplateBinding CornerRadius}" />
+                        <TextBlock
+                            x:Name="PlaceholderTextBlock"
+                            Grid.Column="0"
+                            Margin="{TemplateBinding Padding}"
+                            HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                            VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
+                            Foreground="{TemplateBinding Foreground}"
+                            IsVisible="{TemplateBinding SelectionBoxItem,Converter={x:Static ObjectConverters.IsNull}}"
+                            Opacity="0.3"
+                            Text="{TemplateBinding PlaceholderText}" />
+                        <ContentPresenter
+                            x:Name="ContentPresenter"
+                            Grid.Column="0"
+                            Margin="{TemplateBinding Padding}"
+                            HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
+                            VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
+                            Content="{TemplateBinding SelectionBoxItem}"
+                            ContentTemplate="{TemplateBinding ItemTemplate}" />
+
+                        <Border
+                            x:Name="DropDownOverlay"
+                            Grid.Column="1"
+                            Width="30"
+                            Margin="0,1,1,1"
+                            HorizontalAlignment="Right"
+                            Background="Transparent"
+                            IsVisible="False" />
+
+                        <PathIcon
+                            x:Name="DropDownGlyph"
+                            Grid.Column="1"
+                            Width="12"
+                            Height="12"
+                            Margin="0,0,10,0"
+                            HorizontalAlignment="Right"
+                            VerticalAlignment="Center"
+                            Data="{DynamicResource ComboBoxIcon}"
+                            Foreground="{DynamicResource ComboBoxIconDefaultForeground}"
+                            IsHitTestVisible="False"
+                            UseLayoutRounding="False" />
+
+                        <Popup
+                            Name="PART_Popup"
+                            Grid.Column="0"
+                            MinWidth="{Binding Bounds.Width, RelativeSource={RelativeSource TemplatedParent}}"
+                            MaxHeight="{TemplateBinding MaxDropDownHeight}"
+                            ClipToBounds="False"
+                            InheritsTransform="True"
+                            IsLightDismissEnabled="True"
+                            IsOpen="{TemplateBinding IsDropDownOpen,Mode=TwoWay}"
+                            PlacementTarget="Background"
+                            WindowManagerAddShadowHint="False">
+                            <Border
+                                x:Name="PopupBorder"
+                                Margin="0,4"
+                                HorizontalAlignment="Stretch"
+                                Background="{DynamicResource ComboBoxPopupBackground}"
+                                BorderBrush="{DynamicResource ComboBoxPopupBorderBrush}"
+                                BorderThickness="{DynamicResource ComboBoxPopupBorderThickness}"
+                                BoxShadow="{DynamicResource ComboBoxPopupBoxShadow}"
+                                ClipToBounds="True"
+                                CornerRadius="6">
+                                <ScrollViewer
+                                    HorizontalScrollBarVisibility="{TemplateBinding ScrollViewer.HorizontalScrollBarVisibility}"
+                                    VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}">
+                                    <ItemsPresenter
+                                        Name="PART_ItemsPresenter"
+                                        Margin="{DynamicResource ComboBoxDropdownContentMargin}"
+                                        ItemsPanel="{TemplateBinding ItemsPanel}" />
+                                </ScrollViewer>
+                            </Border>
+                        </Popup>
+                    </Grid>
+                </DataValidationErrors>
             </ControlTemplate>
         </Setter>
 
-        <Style Selector="^.Large">
+        <Style Selector="^.Large /template/ Border#Background">
             <Setter Property="ComboBox.MinHeight" Value="{DynamicResource ComboBoxLargeHeight}" />
         </Style>
-        <Style Selector="^.Small">
+        <Style Selector="^.Small /template/ Border#Background">
             <Setter Property="ComboBox.MinHeight" Value="{DynamicResource ComboBoxSmallHeight}" />
         </Style>
 
@@ -173,6 +175,25 @@
                 <Setter Property="Foreground" Value="{DynamicResource ComboBoxIconDisabledForeground}" />
             </Style>
         </Style>
+        <!--  Error State  -->
+        <Style Selector="^:error">
+            <Style Selector="^ /template/ Border#Background">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsBackground}" />
+            </Style>
+            <Style Selector="^:pointerover /template/ Border#Background">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsPointerOverBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:pressed /template/ Border#Background">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsPressedBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:focus /template/ Border#Background">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsSelectedBackground}" />
+                <Setter Property="BorderBrush" Value="{DynamicResource DataValidationErrorsSelectedBorderBrush}" />
+            </Style>
+        </Style>
+
         <Style Selector="^.Bordered">
             <Style Selector="^ /template/ Border#Background">
                 <Setter Property="Background" Value="{DynamicResource ComboBoxSelectorBorderedBackground}" />
@@ -201,6 +222,24 @@
                     <Setter Property="Foreground" Value="{DynamicResource ComboBoxIconDisabledForeground}" />
                 </Style>
             </Style>
+            <Style Selector="^:error">
+                <Style Selector="^ /template/ Border#Background">
+                    <Setter Property="Background" Value="{DynamicResource DataValidationErrorsBackground}" />
+                    <Setter Property="BorderBrush" Value="{DynamicResource DataValidationErrorsBorderBrush}" />
+                </Style>
+                <Style Selector="^:pointerover /template/ Border#Background">
+                    <Setter Property="Background" Value="{DynamicResource DataValidationErrorsPointerOverBackground}" />
+                    <Setter Property="BorderBrush" Value="{DynamicResource DataValidationErrorsPointerOverBorderBrush}" />
+                </Style>
+                <Style Selector="^:pressed /template/ Border#Background">
+                    <Setter Property="Background" Value="{DynamicResource DataValidationErrorsPressedBackground}" />
+                    <Setter Property="BorderBrush" Value="{DynamicResource DataValidationErrorsPressedBorderBrush}" />
+                </Style>
+                <Style Selector="^:focus /template/ Border#Background">
+                    <Setter Property="Background" Value="{DynamicResource DataValidationErrorsSelectedBackground}" />
+                    <Setter Property="BorderBrush" Value="{DynamicResource DataValidationErrorsSelectedBorderBrush}" />
+                </Style>
+            </Style>
         </Style>
     </ControlTheme>
 
diff --git a/src/Semi.Avalonia/Controls/Controls.axaml b/src/Semi.Avalonia/Controls/Controls.axaml
index 59e49ad..1674a64 100644
--- a/src/Semi.Avalonia/Controls/Controls.axaml
+++ b/src/Semi.Avalonia/Controls/Controls.axaml
@@ -16,6 +16,7 @@
         <ResourceInclude Source="avares://Semi.Avalonia/Controls/ComboBox.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Controls/ContentControl.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Controls/ContextMenu.axaml" />
+        <ResourceInclude Source="avares://Semi.Avalonia/Controls/DataValidationErrors.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Controls/DatePicker.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Controls/DateTimePickerShared.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Controls/DropDownButton.axaml" />
diff --git a/src/Semi.Avalonia/Controls/DataValidationErrors.axaml b/src/Semi.Avalonia/Controls/DataValidationErrors.axaml
new file mode 100644
index 0000000..a91ebf0
--- /dev/null
+++ b/src/Semi.Avalonia/Controls/DataValidationErrors.axaml
@@ -0,0 +1,108 @@
+<ResourceDictionary
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:collections="clr-namespace:System.Collections;assembly=netstandard">
+    <!--  Add Resources Here  -->
+    <ControlTheme x:Key="{x:Type DataValidationErrors}" TargetType="DataValidationErrors">
+        <Setter Property="Template">
+            <ControlTemplate TargetType="DataValidationErrors">
+                <DockPanel LastChildFill="True">
+                    <ContentControl
+                        x:Name="InlineDataValidationContentControl"
+                        Margin="0,4,0,0"
+                        Content="{Binding (DataValidationErrors.Errors)}"
+                        ContentTemplate="{TemplateBinding ErrorTemplate}"
+                        DataContext="{TemplateBinding Owner}"
+                        DockPanel.Dock="Bottom"
+                        IsVisible="{Binding (DataValidationErrors.HasErrors)}" />
+                    <ContentPresenter
+                        Name="PART_ContentPresenter"
+                        Padding="{TemplateBinding Padding}"
+                        Background="{TemplateBinding Background}"
+                        BorderThickness="{TemplateBinding BorderThickness}"
+                        Content="{TemplateBinding Content}"
+                        ContentTemplate="{TemplateBinding ContentTemplate}"
+                        CornerRadius="{TemplateBinding CornerRadius}" />
+                </DockPanel>
+            </ControlTemplate>
+        </Setter>
+        <Setter Property="ErrorTemplate">
+            <DataTemplate>
+                <ItemsControl
+                    x:DataType="DataValidationErrors"
+                    Foreground="{DynamicResource DataValidationErrorsForeground}"
+                    ItemsSource="{Binding}">
+                    <ItemsControl.Styles>
+                        <Style Selector="TextBlock">
+                            <Setter Property="TextWrapping" Value="Wrap" />
+                        </Style>
+                    </ItemsControl.Styles>
+                </ItemsControl>
+            </DataTemplate>
+        </Setter>
+    </ControlTheme>
+    <ControlTheme x:Key="SilentDataValidationErrors" TargetType="DataValidationErrors">
+        <Setter Property="Template">
+            <ControlTemplate TargetType="DataValidationErrors">
+                <ContentPresenter
+                    Name="PART_ContentPresenter"
+                    Padding="{TemplateBinding Padding}"
+                    Background="{TemplateBinding Background}"
+                    BorderThickness="{TemplateBinding BorderThickness}"
+                    Content="{TemplateBinding Content}"
+                    ContentTemplate="{TemplateBinding ContentTemplate}"
+                    CornerRadius="{TemplateBinding CornerRadius}" />
+            </ControlTemplate>
+        </Setter>
+    </ControlTheme>
+
+    <ControlTheme x:Key="TooltipDataValidationErrors" TargetType="DataValidationErrors">
+        <Setter Property="Template">
+            <ControlTemplate TargetType="DataValidationErrors">
+                <DockPanel LastChildFill="True">
+                    <ContentControl
+                        Content="{Binding (DataValidationErrors.Errors)}"
+                        ContentTemplate="{TemplateBinding ErrorTemplate}"
+                        DataContext="{TemplateBinding Owner}"
+                        DockPanel.Dock="Right"
+                        IsVisible="{Binding (DataValidationErrors.HasErrors)}" />
+                    <ContentPresenter
+                        Name="PART_ContentPresenter"
+                        Padding="{TemplateBinding Padding}"
+                        Background="{TemplateBinding Background}"
+                        BorderBrush="{TemplateBinding BorderBrush}"
+                        BorderThickness="{TemplateBinding BorderThickness}"
+                        Content="{TemplateBinding Content}"
+                        ContentTemplate="{TemplateBinding ContentTemplate}"
+                        CornerRadius="{TemplateBinding CornerRadius}" />
+                </DockPanel>
+            </ControlTemplate>
+        </Setter>
+        <Setter Property="ErrorTemplate">
+            <DataTemplate>
+                <Panel Name="PART_InlineErrorTemplatePanel" Background="Transparent">
+                    <Panel.Styles>
+                        <Style Selector="Panel#PART_InlineErrorTemplatePanel">
+                            <Setter Property="Margin" Value="8,0" />
+                        </Style>
+                        <Style Selector="Panel#PART_InlineErrorTemplatePanel ToolTip">
+                            <Setter Property="BorderBrush" Value="{DynamicResource DataValidationErrorsForeground}" />
+                        </Style>
+                        <Style Selector="Panel#PART_InlineErrorTemplatePanel ToolTip TextBlock">
+                            <Setter Property="TextWrapping" Value="Wrap" />
+                        </Style>
+                    </Panel.Styles>
+                    <ToolTip.Tip>
+                        <ItemsControl x:DataType="collections:IEnumerable" ItemsSource="{Binding}" />
+                    </ToolTip.Tip>
+                    <Path
+                        Width="14"
+                        Height="14"
+                        Data="M14,7 A7,7 0 0,0 0,7 M0,7 A7,7 0 1,0 14,7 M7,3l0,5 M7,9l0,2"
+                        Stroke="{DynamicResource DataValidationErrorsForeground}"
+                        StrokeThickness="2" />
+                </Panel>
+            </DataTemplate>
+        </Setter>
+    </ControlTheme>
+</ResourceDictionary>
diff --git a/src/Semi.Avalonia/Controls/DatePicker.axaml b/src/Semi.Avalonia/Controls/DatePicker.axaml
index 2f5b986..d37ec77 100644
--- a/src/Semi.Avalonia/Controls/DatePicker.axaml
+++ b/src/Semi.Avalonia/Controls/DatePicker.axaml
@@ -125,7 +125,6 @@
     </ControlTheme>
 
     <ControlTheme x:Key="{x:Type DatePicker}" TargetType="DatePicker">
-        <Setter Property="MinHeight" Value="{DynamicResource DateTimePickerButtonDefaultHeight}" />
         <Setter Property="Foreground" Value="{DynamicResource DateTimePickerButtonForeground}" />
         <Setter Property="Background" Value="{DynamicResource DateTimePickerButtonBackground}" />
         <Setter Property="BorderBrush" Value="{DynamicResource DateTimePickerButtonBorderBrush}" />
@@ -135,90 +134,94 @@
         <Setter Property="VerticalAlignment" Value="Center" />
         <Setter Property="Template">
             <ControlTemplate TargetType="DatePicker">
-                <Grid Name="LayoutRoot" Margin="{TemplateBinding Padding}">
-                    <Button
-                        Name="PART_FlyoutButton"
-                        Width="298"
-                        MinWidth="298"
-                        HorizontalAlignment="Stretch"
-                        VerticalAlignment="Stretch"
-                        Background="{TemplateBinding Background}"
-                        BorderBrush="{TemplateBinding BorderBrush}"
-                        BorderThickness="{TemplateBinding BorderThickness}"
-                        CornerRadius="{TemplateBinding CornerRadius}"
-                        Cursor="Hand"
-                        Foreground="{TemplateBinding Foreground}"
-                        IsEnabled="{TemplateBinding IsEnabled}"
-                        Theme="{StaticResource DateTimePickerFlyoutButton}">
-                        <Grid ColumnDefinitions="*, Auto">
-                            <Grid
-                                Name="PART_ButtonContentGrid"
-                                Grid.Column="0"
-                                VerticalAlignment="Center"
-                                ColumnDefinitions="78*,Auto,132*,Auto,78*">
-                                <TextBlock
-                                    Name="PART_DayTextBlock"
-                                    Padding="12,4"
-                                    HorizontalAlignment="Center"
+                <DataValidationErrors>
+                    <Grid Name="LayoutRoot" Margin="{TemplateBinding Padding}">
+                        <Button
+                            Name="PART_FlyoutButton"
+                            Width="298"
+                            MinWidth="298"
+                            HorizontalAlignment="Stretch"
+                            VerticalAlignment="Stretch"
+                            Background="{TemplateBinding Background}"
+                            BorderBrush="{TemplateBinding BorderBrush}"
+                            BorderThickness="{TemplateBinding BorderThickness}"
+                            CornerRadius="{TemplateBinding CornerRadius}"
+                            Cursor="Hand"
+                            DataValidationErrors.Errors="{TemplateBinding (DataValidationErrors.Errors)}"
+                            Foreground="{TemplateBinding Foreground}"
+                            IsEnabled="{TemplateBinding IsEnabled}"
+                            MinHeight="{DynamicResource DateTimePickerButtonDefaultHeight}"
+                            Theme="{StaticResource DateTimePickerFlyoutButton}">
+                            <Grid ColumnDefinitions="*, Auto">
+                                <Grid
+                                    Name="PART_ButtonContentGrid"
+                                    Grid.Column="0"
                                     VerticalAlignment="Center"
-                                    FontFamily="{TemplateBinding FontFamily}"
-                                    FontSize="{TemplateBinding FontSize}"
-                                    FontWeight="{TemplateBinding FontWeight}"
-                                    Text="day" />
-                                <TextBlock
-                                    Name="PART_MonthTextBlock"
-                                    Padding="12,4"
-                                    VerticalAlignment="Center"
-                                    FontFamily="{TemplateBinding FontFamily}"
-                                    FontSize="{TemplateBinding FontSize}"
-                                    FontWeight="{TemplateBinding FontWeight}"
-                                    Text="month"
-                                    TextAlignment="Left" />
-                                <TextBlock
-                                    Name="PART_YearTextBlock"
-                                    Padding="12,4"
-                                    HorizontalAlignment="Center"
-                                    VerticalAlignment="Center"
-                                    FontFamily="{TemplateBinding FontFamily}"
-                                    FontSize="{TemplateBinding FontSize}"
-                                    FontWeight="{TemplateBinding FontWeight}"
-                                    Text="year" />
-                                <Rectangle
-                                    x:Name="PART_FirstSpacer"
+                                    ColumnDefinitions="78*,Auto,132*,Auto,78*">
+                                    <TextBlock
+                                        Name="PART_DayTextBlock"
+                                        Padding="12,4"
+                                        HorizontalAlignment="Center"
+                                        VerticalAlignment="Center"
+                                        FontFamily="{TemplateBinding FontFamily}"
+                                        FontSize="{TemplateBinding FontSize}"
+                                        FontWeight="{TemplateBinding FontWeight}"
+                                        Text="day" />
+                                    <TextBlock
+                                        Name="PART_MonthTextBlock"
+                                        Padding="12,4"
+                                        VerticalAlignment="Center"
+                                        FontFamily="{TemplateBinding FontFamily}"
+                                        FontSize="{TemplateBinding FontSize}"
+                                        FontWeight="{TemplateBinding FontWeight}"
+                                        Text="month"
+                                        TextAlignment="Left" />
+                                    <TextBlock
+                                        Name="PART_YearTextBlock"
+                                        Padding="12,4"
+                                        HorizontalAlignment="Center"
+                                        VerticalAlignment="Center"
+                                        FontFamily="{TemplateBinding FontFamily}"
+                                        FontSize="{TemplateBinding FontSize}"
+                                        FontWeight="{TemplateBinding FontWeight}"
+                                        Text="year" />
+                                    <Rectangle
+                                        x:Name="PART_FirstSpacer"
+                                        Grid.Column="1"
+                                        Width="1"
+                                        Margin="0,4"
+                                        HorizontalAlignment="Center"
+                                        Fill="{DynamicResource DateTimePickerSeparatorBackground}" />
+                                    <Rectangle
+                                        x:Name="PART_SecondSpacer"
+                                        Grid.Column="3"
+                                        Width="1"
+                                        Margin="0,4"
+                                        HorizontalAlignment="Center"
+                                        Fill="{DynamicResource DateTimePickerSeparatorBackground}" />
+                                </Grid>
+                                <PathIcon
+                                    Name="PART_Icon"
                                     Grid.Column="1"
-                                    Width="1"
-                                    Margin="0,4"
-                                    HorizontalAlignment="Center"
-                                    Fill="{DynamicResource DateTimePickerSeparatorBackground}" />
-                                <Rectangle
-                                    x:Name="PART_SecondSpacer"
-                                    Grid.Column="3"
-                                    Width="1"
-                                    Margin="0,4"
-                                    HorizontalAlignment="Center"
-                                    Fill="{DynamicResource DateTimePickerSeparatorBackground}" />
+                                    Width="16"
+                                    Height="16"
+                                    Margin="0,0,8,0"
+                                    Data="{DynamicResource DatePickerIconGlyph}"
+                                    Foreground="{DynamicResource DateTimePickerIconForeground}" />
                             </Grid>
-                            <PathIcon
-                                Name="PART_Icon"
-                                Grid.Column="1"
-                                Width="16"
-                                Height="16"
-                                Margin="0,0,8,0"
-                                Data="{DynamicResource DatePickerIconGlyph}"
-                                Foreground="{DynamicResource DateTimePickerIconForeground}" />
-                        </Grid>
-                    </Button>
+                        </Button>
 
-                    <Popup
-                        Name="PART_Popup"
-                        IsLightDismissEnabled="True"
-                        Placement="Bottom"
-                        PlacementTarget="{TemplateBinding}"
-                        WindowManagerAddShadowHint="False">
-                        <DatePickerPresenter Name="PART_PickerPresenter" />
-                    </Popup>
+                        <Popup
+                            Name="PART_Popup"
+                            IsLightDismissEnabled="True"
+                            Placement="Bottom"
+                            PlacementTarget="{TemplateBinding}"
+                            WindowManagerAddShadowHint="False">
+                            <DatePickerPresenter Name="PART_PickerPresenter" />
+                        </Popup>
 
-                </Grid>
+                    </Grid>
+                </DataValidationErrors>
             </ControlTemplate>
         </Setter>
 
@@ -230,10 +233,10 @@
         <Style Selector="^:hasnodate /template/ Button#PART_FlyoutButton TextBlock">
             <Setter Property="Foreground" Value="{DynamicResource DateTimePickerEmptyForeground}" />
         </Style>
-        <Style Selector="^.Large">
+        <Style Selector="^.Large /template/ Button#PART_FlyoutButton">
             <Setter Property="MinHeight" Value="{DynamicResource DateTimePickerButtonLargeHeight}" />
         </Style>
-        <Style Selector="^.Small">
+        <Style Selector="^.Small /template/ Button#PART_FlyoutButton">
             <Setter Property="MinHeight" Value="{DynamicResource DateTimePickerButtonSmallHeight}" />
         </Style>
     </ControlTheme>
diff --git a/src/Semi.Avalonia/Controls/DateTimePickerShared.axaml b/src/Semi.Avalonia/Controls/DateTimePickerShared.axaml
index e5c96cb..f18ddaf 100644
--- a/src/Semi.Avalonia/Controls/DateTimePickerShared.axaml
+++ b/src/Semi.Avalonia/Controls/DateTimePickerShared.axaml
@@ -30,6 +30,25 @@
             <Setter Property="BorderBrush" Value="{DynamicResource DateTimePickerButtonDisabledBorderBrush}" />
             <Setter Property="Background" Value="{DynamicResource DateTimePickerButtonDisabledBackground}" />
         </Style>
+
+        <Style Selector="^:error">
+            <Style Selector="^ /template/ ContentPresenter#PART_ContentPresenter">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:pointerover /template/ ContentPresenter#PART_ContentPresenter">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsPointerOverBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:pressed /template/ ContentPresenter#PART_ContentPresenter">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsPressedBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:focus /template/ ContentPresenter#PART_ContentPresenter">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsSelectedBackground}" />
+                <Setter Property="BorderBrush" Value="{DynamicResource DataValidationErrorsSelectedBorderBrush}" />
+            </Style>
+        </Style>
     </ControlTheme>
 
     <!--  Theme for the items displayed in the selectors  -->
diff --git a/src/Semi.Avalonia/Controls/NumericUpDown.axaml b/src/Semi.Avalonia/Controls/NumericUpDown.axaml
index fe21510..fe4fc2d 100644
--- a/src/Semi.Avalonia/Controls/NumericUpDown.axaml
+++ b/src/Semi.Avalonia/Controls/NumericUpDown.axaml
@@ -5,45 +5,67 @@
     <!--  Add Resources Here  -->
     <ControlTheme x:Key="{x:Type NumericUpDown}" TargetType="NumericUpDown">
         <Setter Property="NumericUpDown.VerticalContentAlignment" Value="Center" />
-        <Setter Property="NumericUpDown.MinHeight" Value="{DynamicResource NumericUpDownWrapperDefaultHeight}" />
         <Setter Property="NumericUpDown.CornerRadius" Value="{DynamicResource NumericUpDownCornerRadius}" />
         <Setter Property="NumericUpDown.Template">
             <ControlTemplate TargetType="NumericUpDown">
-                <ButtonSpinner
-                    Name="PART_Spinner"
-                    MinWidth="0"
-                    HorizontalContentAlignment="Stretch"
-                    VerticalContentAlignment="Stretch"
-                    AllowSpin="{TemplateBinding AllowSpin}"
-                    Background="{TemplateBinding Background}"
-                    BorderBrush="{TemplateBinding BorderBrush}"
-                    BorderThickness="{TemplateBinding BorderThickness}"
-                    ButtonSpinnerLocation="{TemplateBinding ButtonSpinnerLocation}"
-                    ShowButtonSpinner="{TemplateBinding ShowButtonSpinner}">
-                    <TextBox
-                        Name="PART_TextBox"
-                        Height="{TemplateBinding Height}"
-                        MinHeight="{TemplateBinding MinHeight}"
-                        HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
-                        VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
-                        AcceptsReturn="False"
-                        CornerRadius="{TemplateBinding CornerRadius}"
-                        FontSize="{TemplateBinding FontSize}"
-                        Foreground="{TemplateBinding Foreground}"
-                        IsReadOnly="{TemplateBinding IsReadOnly}"
-                        Text="{TemplateBinding Text}"
-                        TextWrapping="NoWrap"
-                        Watermark="{TemplateBinding Watermark}" />
-                </ButtonSpinner>
+                <DataValidationErrors>
+                    <ButtonSpinner
+                        Name="PART_Spinner"
+                        MinWidth="0"
+                        HorizontalContentAlignment="Stretch"
+                        VerticalContentAlignment="Stretch"
+                        AllowSpin="{TemplateBinding AllowSpin}"
+                        Background="{TemplateBinding Background}"
+                        BorderBrush="{TemplateBinding BorderBrush}"
+                        BorderThickness="{TemplateBinding BorderThickness}"
+                        ButtonSpinnerLocation="{TemplateBinding ButtonSpinnerLocation}"
+                        ShowButtonSpinner="{TemplateBinding ShowButtonSpinner}">
+                        <TextBox
+                            Name="PART_TextBox"
+                            Height="{TemplateBinding Height}"
+                            MinHeight="{DynamicResource NumericUpDownWrapperDefaultHeight}"
+                            HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
+                            VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
+                            AcceptsReturn="False"
+                            CornerRadius="{TemplateBinding CornerRadius}"
+                            DataValidationErrors.Errors="{ReflectionBinding $parent[NumericUpDown].(DataValidationErrors.Errors)}"
+                            FontSize="{TemplateBinding FontSize}"
+                            Foreground="{TemplateBinding Foreground}"
+                            IsReadOnly="{TemplateBinding IsReadOnly}"
+                            Text="{TemplateBinding Text}"
+                            TextWrapping="NoWrap"
+                            Theme="{DynamicResource NonErrorTextBox}"
+                            Watermark="{TemplateBinding Watermark}" />
+                    </ButtonSpinner>
+                </DataValidationErrors>
             </ControlTemplate>
         </Setter>
 
-        <Style Selector="^.Large">
+        <Style Selector="^.Large /template/ TextBox#PART_TextBox">
             <Setter Property="MinHeight" Value="{DynamicResource NumericUpDownWrapperLargeHeight}" />
         </Style>
-        <Style Selector="^.Small">
+        <Style Selector="^.Small /template/ TextBox#PART_TextBox">
             <Setter Property="MinHeight" Value="{DynamicResource NumericUpDownWrapperSmallHeight}" />
         </Style>
+
+        <Style Selector="^:error">
+            <Style Selector="^ /template/ TextBox#PART_TextBox">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:pointerover /template/ TextBox#PART_TextBox">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsPointerOverBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:pressed /template/ TextBox#PART_TextBox">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsPressedBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:focus /template/ TextBox#PART_TextBox">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsSelectedBackground}" />
+                <Setter Property="BorderBrush" Value="{DynamicResource DataValidationErrorsSelectedBorderBrush}" />
+            </Style>
+        </Style>
     </ControlTheme>
 
-</ResourceDictionary>
+</ResourceDictionary>
\ No newline at end of file
diff --git a/src/Semi.Avalonia/Controls/Slider.axaml b/src/Semi.Avalonia/Controls/Slider.axaml
index 949823b..a072fdb 100644
--- a/src/Semi.Avalonia/Controls/Slider.axaml
+++ b/src/Semi.Avalonia/Controls/Slider.axaml
@@ -60,10 +60,10 @@
                     CornerRadius="{TemplateBinding CornerRadius}" />
             </ControlTemplate>
         </Setter>
-        <Style Selector="^:pointerover /template/ Border">
+        <Style Selector="^:pointerover">
             <Setter Property="BorderBrush" Value="{DynamicResource SliderThumbPointeroverBorderBrush}" />
         </Style>
-        <Style Selector="^:pressed /template/ Border">
+        <Style Selector="^:pressed">
             <Setter Property="BorderBrush" Value="{DynamicResource SliderThumbPressedBorderBrush}" />
         </Style>
     </ControlTheme>
@@ -75,165 +75,155 @@
         <Style Selector="^:horizontal">
             <Setter Property="Template">
                 <ControlTemplate TargetType="Slider">
-                    <Border
-                        BorderBrush="{TemplateBinding BorderBrush}"
-                        BorderThickness="{TemplateBinding BorderThickness}"
-                        CornerRadius="{TemplateBinding CornerRadius}">
+                    <DataValidationErrors>
                         <Grid
                             x:Name="SliderContainer"
                             Margin="{TemplateBinding Padding}"
-                            Background="Transparent">
+                            Background="Transparent"
+                            RowDefinitions="Auto,Auto,Auto">
                             <Grid.Styles>
                                 <Style Selector="TickBar">
                                     <Setter Property="ReservedSpace" Value="{Binding #PART_Track.Thumb.Bounds}" />
                                 </Style>
                             </Grid.Styles>
-                            <Grid x:Name="HorizontalTemplate" RowDefinitions="Auto,Auto,Auto">
-                                <TickBar
-                                    Name="TopTickBar"
-                                    Grid.Row="0"
-                                    Height="{DynamicResource SliderTickHorizontalHeight}"
-                                    Margin="0,0,0,4"
-                                    VerticalAlignment="Bottom"
-                                    Fill="{DynamicResource SliderTickForeground}"
-                                    IsVisible="False"
-                                    Maximum="{TemplateBinding Slider.Maximum}"
-                                    Minimum="{TemplateBinding Slider.Minimum}"
-                                    Orientation="{TemplateBinding Slider.Orientation}"
-                                    Placement="Top"
-                                    TickFrequency="{TemplateBinding Slider.TickFrequency}"
-                                    Ticks="{TemplateBinding Ticks}" />
-                                <TickBar
-                                    Name="BottomTickBar"
-                                    Grid.Row="2"
-                                    Height="{DynamicResource SliderTickHorizontalHeight}"
-                                    Margin="0,4,0,0"
-                                    VerticalAlignment="Top"
-                                    Fill="{DynamicResource SliderTickForeground}"
-                                    IsVisible="False"
-                                    Maximum="{TemplateBinding Slider.Maximum}"
-                                    Minimum="{TemplateBinding Slider.Minimum}"
-                                    Orientation="{TemplateBinding Slider.Orientation}"
-                                    Placement="Bottom"
-                                    TickFrequency="{TemplateBinding Slider.TickFrequency}"
-                                    Ticks="{TemplateBinding Ticks}" />
-                                <Track
-                                    Name="PART_Track"
-                                    Grid.Row="1"
-                                    IsDirectionReversed="{TemplateBinding IsDirectionReversed}"
-                                    Maximum="{TemplateBinding Maximum}"
-                                    Minimum="{TemplateBinding Minimum}"
-                                    Orientation="Horizontal"
-                                    Value="{TemplateBinding Value,
-                                                            Mode=TwoWay}">
-                                    <Track.DecreaseButton>
-                                        <RepeatButton
-                                            Name="PART_DecreaseButton"
-                                            Background="{TemplateBinding Foreground}"
-                                            Focusable="False"
-                                            Theme="{StaticResource SliderHorizontalRepeatButton}" />
-                                    </Track.DecreaseButton>
-                                    <Track.IncreaseButton>
-                                        <RepeatButton
-                                            Name="PART_IncreaseButton"
-                                            Background="{TemplateBinding Background}"
-                                            Focusable="False"
-                                            Theme="{StaticResource SliderHorizontalRepeatButton}" />
-                                    </Track.IncreaseButton>
-                                    <Thumb
-                                        Name="thumb"
-                                        Width="{DynamicResource SliderThumbWidth}"
-                                        Height="{DynamicResource SliderThumbHeight}"
-                                        DataContext="{TemplateBinding Value}"
-                                        Theme="{StaticResource SliderThumbTheme}" />
-                                </Track>
-                            </Grid>
+                            <TickBar
+                                Name="TopTickBar"
+                                Grid.Row="0"
+                                Height="{DynamicResource SliderTickHorizontalHeight}"
+                                Margin="0,0,0,4"
+                                VerticalAlignment="Bottom"
+                                Fill="{DynamicResource SliderTickForeground}"
+                                IsVisible="False"
+                                Maximum="{TemplateBinding Slider.Maximum}"
+                                Minimum="{TemplateBinding Slider.Minimum}"
+                                Orientation="{TemplateBinding Slider.Orientation}"
+                                Placement="Top"
+                                TickFrequency="{TemplateBinding Slider.TickFrequency}"
+                                Ticks="{TemplateBinding Ticks}" />
+                            <TickBar
+                                Name="BottomTickBar"
+                                Grid.Row="2"
+                                Height="{DynamicResource SliderTickHorizontalHeight}"
+                                Margin="0,4,0,0"
+                                VerticalAlignment="Top"
+                                Fill="{DynamicResource SliderTickForeground}"
+                                IsVisible="False"
+                                Maximum="{TemplateBinding Slider.Maximum}"
+                                Minimum="{TemplateBinding Slider.Minimum}"
+                                Orientation="{TemplateBinding Slider.Orientation}"
+                                Placement="Bottom"
+                                TickFrequency="{TemplateBinding Slider.TickFrequency}"
+                                Ticks="{TemplateBinding Ticks}" />
+                            <Track
+                                Name="PART_Track"
+                                Grid.Row="1"
+                                IsDirectionReversed="{TemplateBinding IsDirectionReversed}"
+                                Maximum="{TemplateBinding Maximum}"
+                                Minimum="{TemplateBinding Minimum}"
+                                Orientation="Horizontal"
+                                Value="{TemplateBinding Value,
+                                                        Mode=TwoWay}">
+                                <Track.DecreaseButton>
+                                    <RepeatButton
+                                        Name="PART_DecreaseButton"
+                                        Background="{TemplateBinding Foreground}"
+                                        Focusable="False"
+                                        Theme="{StaticResource SliderHorizontalRepeatButton}" />
+                                </Track.DecreaseButton>
+                                <Track.IncreaseButton>
+                                    <RepeatButton
+                                        Name="PART_IncreaseButton"
+                                        Background="{TemplateBinding Background}"
+                                        Focusable="False"
+                                        Theme="{StaticResource SliderHorizontalRepeatButton}" />
+                                </Track.IncreaseButton>
+                                <Thumb
+                                    Name="thumb"
+                                    Width="{DynamicResource SliderThumbWidth}"
+                                    Height="{DynamicResource SliderThumbHeight}"
+                                    DataContext="{TemplateBinding Value}"
+                                    Theme="{StaticResource SliderThumbTheme}" />
+                            </Track>
                         </Grid>
-                    </Border>
+                    </DataValidationErrors>
                 </ControlTemplate>
             </Setter>
         </Style>
         <Style Selector="^:vertical">
             <Setter Property="Template">
                 <ControlTemplate>
-                    <Border
-                        BorderBrush="{TemplateBinding BorderBrush}"
-                        BorderThickness="{TemplateBinding BorderThickness}"
-                        CornerRadius="{TemplateBinding CornerRadius}">
+                    <DataValidationErrors>
                         <Grid
                             x:Name="SliderContainer"
+                            MinWidth="{DynamicResource SliderVerticalWidth}"
                             Margin="{TemplateBinding Padding}"
-                            Background="{DynamicResource SliderContainerBackground}">
+                            Background="{DynamicResource SliderContainerBackground}"
+                            ColumnDefinitions="Auto,Auto,Auto">
                             <Grid.Styles>
                                 <Style Selector="TickBar">
                                     <Setter Property="ReservedSpace" Value="{Binding #PART_Track.Thumb.Bounds}" />
                                 </Style>
                             </Grid.Styles>
-                            <Grid
-                                x:Name="VerticalTemplate"
-                                MinWidth="{DynamicResource SliderVerticalWidth}"
-                                ColumnDefinitions="Auto,Auto,Auto">
-                                <TickBar
-                                    Name="LeftTickBar"
-                                    Grid.Column="0"
-                                    Width="{DynamicResource SliderTickVerticalWidth}"
-                                    Margin="0,0,4,0"
-                                    HorizontalAlignment="Right"
-                                    Fill="{DynamicResource SliderTickForeground}"
-                                    IsVisible="False"
-                                    Maximum="{TemplateBinding Slider.Maximum}"
-                                    Minimum="{TemplateBinding Slider.Minimum}"
-                                    Orientation="{TemplateBinding Slider.Orientation}"
-                                    Placement="Left"
-                                    TickFrequency="{TemplateBinding Slider.TickFrequency}"
-                                    Ticks="{TemplateBinding Ticks}" />
-                                <TickBar
-                                    Name="RightTickBar"
-                                    Grid.Column="2"
-                                    Width="{DynamicResource SliderTickVerticalWidth}"
-                                    Margin="4,0,0,0"
-                                    HorizontalAlignment="Left"
-                                    Fill="{DynamicResource SliderTickForeground}"
-                                    IsVisible="False"
-                                    Maximum="{TemplateBinding Slider.Maximum}"
-                                    Minimum="{TemplateBinding Slider.Minimum}"
-                                    Orientation="{TemplateBinding Slider.Orientation}"
-                                    Placement="Right"
-                                    TickFrequency="{TemplateBinding Slider.TickFrequency}"
-                                    Ticks="{TemplateBinding Ticks}" />
-                                <Track
-                                    Name="PART_Track"
-                                    Grid.Column="1"
-                                    IsDirectionReversed="{TemplateBinding IsDirectionReversed}"
-                                    Maximum="{TemplateBinding Maximum}"
-                                    Minimum="{TemplateBinding Minimum}"
-                                    Orientation="Vertical"
-                                    Value="{TemplateBinding Value,
-                                                            Mode=TwoWay}">
-                                    <Track.DecreaseButton>
-                                        <RepeatButton
-                                            Name="PART_DecreaseButton"
-                                            Background="{TemplateBinding Foreground}"
-                                            Focusable="False"
-                                            Theme="{StaticResource SliderVerticalRepeatButton}" />
-                                    </Track.DecreaseButton>
-                                    <Track.IncreaseButton>
-                                        <RepeatButton
-                                            Name="PART_IncreaseButton"
-                                            Background="{TemplateBinding Background}"
-                                            Focusable="False"
-                                            Theme="{StaticResource SliderVerticalRepeatButton}" />
-                                    </Track.IncreaseButton>
-                                    <Thumb
-                                        Name="thumb"
-                                        Width="{DynamicResource SliderThumbWidth}"
-                                        Height="{DynamicResource SliderThumbHeight}"
-                                        DataContext="{TemplateBinding Value}"
-                                        Theme="{StaticResource SliderThumbTheme}" />
-                                </Track>
-                            </Grid>
+                            <TickBar
+                                Name="LeftTickBar"
+                                Grid.Column="0"
+                                Width="{DynamicResource SliderTickVerticalWidth}"
+                                Margin="0,0,4,0"
+                                HorizontalAlignment="Right"
+                                Fill="{DynamicResource SliderTickForeground}"
+                                IsVisible="False"
+                                Maximum="{TemplateBinding Slider.Maximum}"
+                                Minimum="{TemplateBinding Slider.Minimum}"
+                                Orientation="{TemplateBinding Slider.Orientation}"
+                                Placement="Left"
+                                TickFrequency="{TemplateBinding Slider.TickFrequency}"
+                                Ticks="{TemplateBinding Ticks}" />
+                            <TickBar
+                                Name="RightTickBar"
+                                Grid.Column="2"
+                                Width="{DynamicResource SliderTickVerticalWidth}"
+                                Margin="4,0,0,0"
+                                HorizontalAlignment="Left"
+                                Fill="{DynamicResource SliderTickForeground}"
+                                IsVisible="False"
+                                Maximum="{TemplateBinding Slider.Maximum}"
+                                Minimum="{TemplateBinding Slider.Minimum}"
+                                Orientation="{TemplateBinding Slider.Orientation}"
+                                Placement="Right"
+                                TickFrequency="{TemplateBinding Slider.TickFrequency}"
+                                Ticks="{TemplateBinding Ticks}" />
+                            <Track
+                                Name="PART_Track"
+                                Grid.Column="1"
+                                IsDirectionReversed="{TemplateBinding IsDirectionReversed}"
+                                Maximum="{TemplateBinding Maximum}"
+                                Minimum="{TemplateBinding Minimum}"
+                                Orientation="Vertical"
+                                Value="{TemplateBinding Value,
+                                                        Mode=TwoWay}">
+                                <Track.DecreaseButton>
+                                    <RepeatButton
+                                        Name="PART_DecreaseButton"
+                                        Background="{TemplateBinding Foreground}"
+                                        Focusable="False"
+                                        Theme="{StaticResource SliderVerticalRepeatButton}" />
+                                </Track.DecreaseButton>
+                                <Track.IncreaseButton>
+                                    <RepeatButton
+                                        Name="PART_IncreaseButton"
+                                        Background="{TemplateBinding Background}"
+                                        Focusable="False"
+                                        Theme="{StaticResource SliderVerticalRepeatButton}" />
+                                </Track.IncreaseButton>
+                                <Thumb
+                                    Name="thumb"
+                                    Width="{DynamicResource SliderThumbWidth}"
+                                    Height="{DynamicResource SliderThumbHeight}"
+                                    DataContext="{TemplateBinding Value}"
+                                    Theme="{StaticResource SliderThumbTheme}" />
+                            </Track>
                         </Grid>
-                    </Border>
+                    </DataValidationErrors>
                 </ControlTemplate>
             </Setter>
         </Style>
@@ -263,6 +253,10 @@
             <Setter Property="IsVisible" Value="True" />
         </Style>
 
+        <Style Selector="^:error /template/ Thumb#thumb">
+            <Setter Property="Thumb.BorderBrush" Value="{DynamicResource DataValidationErrorsSelectedBorderBrush}" />
+        </Style>
+
         <!--  Disabled State  -->
 
         <Style Selector="^:disabled">
diff --git a/src/Semi.Avalonia/Controls/TextBox.axaml b/src/Semi.Avalonia/Controls/TextBox.axaml
index 26269c0..4d107a7 100644
--- a/src/Semi.Avalonia/Controls/TextBox.axaml
+++ b/src/Semi.Avalonia/Controls/TextBox.axaml
@@ -96,7 +96,6 @@
         <Setter Property="TextBox.FontSize" Value="14" />
         <Setter Property="TextBox.Cursor" Value="Ibeam" />
         <Setter Property="TextBox.CaretBrush" Value="{DynamicResource TextBoxTextCaretBrush}" />
-        <Setter Property="TextBox.MinHeight" Value="{DynamicResource TextBoxWrapperDefaultHeight}" />
         <Setter Property="TextBox.Padding" Value="{DynamicResource TextBoxContentPadding}" />
         <Setter Property="TextBox.VerticalContentAlignment" Value="Center" />
         <Setter Property="TextBox.FocusAdorner" Value="{x:Null}" />
@@ -104,22 +103,207 @@
         <Setter Property="TextBox.ContextFlyout" Value="{StaticResource DefaultTextBoxContextFlyout}" />
         <Setter Property="TextBox.Template">
             <ControlTemplate TargetType="TextBox">
-                <Border
-                    Name="PART_ContentPresenterBorder"
-                    Background="{TemplateBinding Background}"
-                    BorderBrush="{TemplateBinding BorderBrush}"
-                    BorderThickness="{TemplateBinding BorderThickness}"
-                    CornerRadius="{TemplateBinding CornerRadius}">
-                    <Grid Margin="{TemplateBinding Padding}" ColumnDefinitions="Auto,*,Auto, Auto, Auto">
-                        <ContentPresenter
-                            Grid.Column="0"
-                            Padding="{DynamicResource TextBoxInnerLeftContentPadding}"
-                            VerticalAlignment="Center"
-                            Content="{TemplateBinding InnerLeftContent}"
-                            Foreground="{DynamicResource TextBoxInnerForeground}"
-                            IsVisible="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=InnerLeftContent, Converter={x:Static ObjectConverters.IsNotNull}}" />
+                <DataValidationErrors>
+                    <Border
+                        Name="PART_ContentPresenterBorder"
+                        MinHeight="{DynamicResource TextBoxWrapperDefaultHeight}"
+                        Background="{TemplateBinding Background}"
+                        BorderBrush="{TemplateBinding BorderBrush}"
+                        BorderThickness="{TemplateBinding BorderThickness}"
+                        CornerRadius="{TemplateBinding CornerRadius}">
+                        <Grid Margin="{TemplateBinding Padding}" ColumnDefinitions="Auto,*,Auto, Auto, Auto">
+                            <ContentPresenter
+                                Grid.Column="0"
+                                Padding="{DynamicResource TextBoxInnerLeftContentPadding}"
+                                VerticalAlignment="Center"
+                                Content="{TemplateBinding InnerLeftContent}"
+                                Foreground="{DynamicResource TextBoxInnerForeground}"
+                                IsVisible="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=InnerLeftContent, Converter={x:Static ObjectConverters.IsNotNull}}" />
+                            <ScrollViewer
+                                Grid.Column="1"
+                                AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}"
+                                HorizontalScrollBarVisibility="{TemplateBinding (ScrollViewer.HorizontalScrollBarVisibility)}"
+                                IsScrollChainingEnabled="{TemplateBinding (ScrollViewer.IsScrollChainingEnabled)}"
+                                VerticalScrollBarVisibility="{TemplateBinding (ScrollViewer.VerticalScrollBarVisibility)}">
+                                <Panel>
+                                    <TextBlock
+                                        Name="PART_Watermark"
+                                        HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                                        VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
+                                        IsVisible="{TemplateBinding Text,
+                                                                    Converter={x:Static StringConverters.IsNullOrEmpty}}"
+                                        Opacity="0.5"
+                                        Text="{TemplateBinding Watermark}"
+                                        TextAlignment="{TemplateBinding TextAlignment}"
+                                        TextWrapping="{TemplateBinding TextWrapping}" />
+                                    <TextPresenter
+                                        Name="PART_TextPresenter"
+                                        HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                                        VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
+                                        CaretBrush="{TemplateBinding CaretBrush}"
+                                        CaretIndex="{TemplateBinding CaretIndex}"
+                                        LineHeight="{TemplateBinding LineHeight}"
+                                        PasswordChar="{TemplateBinding PasswordChar}"
+                                        RevealPassword="{TemplateBinding RevealPassword}"
+                                        SelectionBrush="{TemplateBinding SelectionBrush}"
+                                        SelectionEnd="{TemplateBinding SelectionEnd}"
+                                        SelectionForegroundBrush="{TemplateBinding SelectionForegroundBrush}"
+                                        SelectionStart="{TemplateBinding SelectionStart}"
+                                        Text="{TemplateBinding Text,
+                                                               Mode=TwoWay}"
+                                        TextAlignment="{TemplateBinding TextAlignment}"
+                                        TextWrapping="{TemplateBinding TextWrapping}" />
+                                </Panel>
+                            </ScrollViewer>
+                            <Button
+                                Name="PART_ClearButton"
+                                Grid.Column="2"
+                                Command="{Binding $parent[TextBox].Clear}"
+                                IsVisible="False"
+                                Theme="{StaticResource InputClearButton}" />
+                            <ToggleButton
+                                Name="PART_RevealButton"
+                                Grid.Column="3"
+                                Margin="4,0,0,0"
+                                IsChecked="{TemplateBinding RevealPassword,
+                                                            Mode=TwoWay}"
+                                IsVisible="False"
+                                Theme="{StaticResource InputToggleButton}" />
+                            <ContentPresenter
+                                Grid.Column="4"
+                                Padding="{DynamicResource TextBoxInnerRightContentPadding}"
+                                VerticalAlignment="Center"
+                                Content="{TemplateBinding InnerRightContent}"
+                                Foreground="{DynamicResource TextBoxInnerForeground}"
+                                IsVisible="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=InnerRightContent, Converter={x:Static ObjectConverters.IsNotNull}}" />
+                        </Grid>
+                    </Border>
+                </DataValidationErrors>
+            </ControlTemplate>
+        </Setter>
+
+        <Style Selector="^:pointerover /template/ Border#PART_ContentPresenterBorder">
+            <Setter Property="Border.Background" Value="{DynamicResource TextBoxPointeroverBackground}" />
+        </Style>
+        <Style Selector="^:pressed /template/ Border#PART_ContentPresenterBorder">
+            <Setter Property="Border.Background" Value="{DynamicResource TextBoxPressedBackground}" />
+        </Style>
+        <Style Selector="^:focus /template/ Border#PART_ContentPresenterBorder">
+            <Setter Property="Border.BorderBrush" Value="{DynamicResource TextBoxFocusBorderBrush}" />
+        </Style>
+        <Style Selector="^:disabled /template/ Border#PART_ContentPresenterBorder">
+            <Setter Property="Border.BorderBrush" Value="{DynamicResource TextBoxDisabledBorderBrush}" />
+            <Setter Property="Border.Background" Value="{DynamicResource TextBoxDisabledBackground}" />
+        </Style>
+        <Style Selector="^:disabled">
+            <Setter Property="TextBox.Foreground" Value="{DynamicResource TextBoxDisabledForeground}" />
+        </Style>
+
+        <Style Selector="^:error">
+            <Style Selector="^ /template/ Border#PART_ContentPresenterBorder">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:pointerover /template/ Border#PART_ContentPresenterBorder">
+                <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsPointerOverBackground}" />
+                <Setter Property="Border.BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:pressed /template/ Border#PART_ContentPresenterBorder">
+                <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsPressedBackground}" />
+                <Setter Property="Border.BorderBrush" Value="Transparent" />
+            </Style>
+            <Style Selector="^:focus /template/ Border#PART_ContentPresenterBorder">
+                <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsSelectedBackground}" />
+                <Setter Property="Border.BorderBrush" Value="{DynamicResource DataValidationErrorsSelectedBorderBrush}" />
+            </Style>
+        </Style>
+
+        <Style Selector="^.clearButton, ^.ClearButton">
+            <Style Selector="^[AcceptsReturn=False][IsReadOnly=False]:focus:not(:empty) /template/ Button#PART_ClearButton">
+                <Setter Property="Button.IsVisible" Value="True" />
+            </Style>
+            <Style Selector="^[AcceptsReturn=False][IsReadOnly=False]:pointerover:not(:empty) /template/ Button#PART_ClearButton">
+                <Setter Property="Button.IsVisible" Value="True" />
+            </Style>
+        </Style>
+        <Style Selector="^.revealPasswordButton, ^.RevealPasswordButton">
+            <Style Selector="^ /template/ ToggleButton#PART_RevealButton">
+                <Setter Property="ToggleButton.IsVisible" Value="True" />
+            </Style>
+        </Style>
+        <Style Selector="^.Large /template/ Border#PART_ContentPresenterBorder">
+            <Setter Property="MinHeight" Value="{DynamicResource TextBoxWrapperLargeHeight}" />
+        </Style>
+        <Style Selector="^.Small /template/ Border#PART_ContentPresenterBorder">
+            <Setter Property="MinHeight" Value="{DynamicResource TextBoxWrapperSmallHeight}" />
+        </Style>
+
+        <Style Selector="^.Bordered">
+            <Setter Property="TextBox.Background" Value="{DynamicResource TextBoxBorderedDefaultBackground}" />
+            <Setter Property="TextBox.BorderBrush" Value="{DynamicResource TextBoxBorderedDefaultBorderBrush}" />
+            <Style Selector="^:pointerover /template/ Border#PART_ContentPresenterBorder">
+                <Setter Property="Border.Background" Value="{DynamicResource TextBoxBorderedPointeroverBackground}" />
+                <Setter Property="Border.BorderBrush" Value="{DynamicResource TextBoxBorderedPointeroverBorderBrush}" />
+            </Style>
+            <Style Selector="^:focus">
+                <Setter Property="TextBox.Background" Value="{DynamicResource TextBoxBorderedPointeroverBackground}" />
+                <Setter Property="TextBox.BorderBrush" Value="{DynamicResource TextBoxBorderedPointeroverBorderBrush}" />
+            </Style>
+            <Style Selector="^:disabled /template/ Border#PART_ContentPresenterBorder">
+                <Setter Property="TextBox.Background" Value="{DynamicResource TextBoxDisabledBackground}" />
+                <Setter Property="TextBox.BorderBrush" Value="{DynamicResource TextBoxDisabledBorderBrush}" />
+            </Style>
+
+            <Style Selector="^:error">
+                <Style Selector="^ /template/ Border#PART_ContentPresenterBorder">
+                    <Setter Property="Background" Value="{DynamicResource DataValidationErrorsBackground}" />
+                    <Setter Property="BorderBrush" Value="{DynamicResource DataValidationErrorsBorderBrush}" />
+                </Style>
+                <Style Selector="^:pointerover /template/ Border#PART_ContentPresenterBorder">
+                    <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsPointerOverBackground}" />
+                    <Setter Property="Border.BorderBrush" Value="{DynamicResource DataValidationErrorsPointerOverBorderBrush}" />
+                </Style>
+                <Style Selector="^:pressed /template/ Border#PART_ContentPresenterBorder">
+                    <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsPressedBackground}" />
+                    <Setter Property="Border.BorderBrush" Value="{DynamicResource DataValidationErrorsPressedBorderBrush}" />
+                </Style>
+                <Style Selector="^:focus /template/ Border#PART_ContentPresenterBorder">
+                    <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsSelectedBackground}" />
+                    <Setter Property="Border.BorderBrush" Value="{DynamicResource DataValidationErrorsSelectedBorderBrush}" />
+                </Style>
+            </Style>
+        </Style>
+    </ControlTheme>
+
+    <ControlTheme x:Key="NonErrorTextBox" TargetType="TextBox">
+        <Setter Property="TextBox.Foreground" Value="{DynamicResource TextBoxForeground}" />
+        <Setter Property="TextBox.Background" Value="{DynamicResource TextBoxDefaultBackground}" />
+        <Setter Property="TextBox.BorderBrush" Value="{DynamicResource TextBoxDefaultBorderBrush}" />
+        <Setter Property="TextBox.SelectionBrush" Value="{DynamicResource TextBoxSelectionBackground}" />
+        <Setter Property="TextBox.SelectionForegroundBrush" Value="{DynamicResource TextBoxSelectionForeground}" />
+        <Setter Property="TextBox.BorderThickness" Value="{DynamicResource TextBoxBorderThickness}" />
+        <Setter Property="TextBox.CornerRadius" Value="{DynamicResource TextBoxDefaultCornerRadius}" />
+        <Setter Property="TextBox.FontSize" Value="14" />
+        <Setter Property="TextBox.Cursor" Value="Ibeam" />
+        <Setter Property="TextBox.CaretBrush" Value="{DynamicResource TextBoxTextCaretBrush}" />
+        <Setter Property="TextBox.Padding" Value="{DynamicResource TextBoxContentPadding}" />
+        <Setter Property="TextBox.MinHeight" Value="{DynamicResource TextBoxWrapperDefaultHeight}" />
+        <Setter Property="TextBox.VerticalContentAlignment" Value="Center" />
+        <Setter Property="TextBox.FocusAdorner" Value="{x:Null}" />
+        <Setter Property="ScrollViewer.IsScrollChainingEnabled" Value="True" />
+        <Setter Property="TextBox.ContextFlyout" Value="{StaticResource DefaultTextBoxContextFlyout}" />
+        <Setter Property="TextBox.Template">
+            <ControlTemplate TargetType="TextBox">
+                <DataValidationErrors Theme="{DynamicResource SilentDataValidationErrors}">
+                    <Border
+                        Name="PART_ContentPresenterBorder"
+                        MinHeight="{TemplateBinding MinHeight}"
+                        Background="{TemplateBinding Background}"
+                        BorderBrush="{TemplateBinding BorderBrush}"
+                        BorderThickness="{TemplateBinding BorderThickness}"
+                        CornerRadius="{TemplateBinding CornerRadius}">
                         <ScrollViewer
-                            Grid.Column="1"
+                            Margin="{TemplateBinding Padding}"
                             AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}"
                             HorizontalScrollBarVisibility="{TemplateBinding (ScrollViewer.HorizontalScrollBarVisibility)}"
                             IsScrollChainingEnabled="{TemplateBinding (ScrollViewer.IsScrollChainingEnabled)}"
@@ -154,29 +338,8 @@
                                     TextWrapping="{TemplateBinding TextWrapping}" />
                             </Panel>
                         </ScrollViewer>
-                        <Button
-                            Name="PART_ClearButton"
-                            Grid.Column="2"
-                            Command="{Binding $parent[TextBox].Clear}"
-                            IsVisible="False"
-                            Theme="{StaticResource InputClearButton}" />
-                        <ToggleButton
-                            Name="PART_RevealButton"
-                            Grid.Column="3"
-                            Margin="4,0,0,0"
-                            IsChecked="{TemplateBinding RevealPassword,
-                                                        Mode=TwoWay}"
-                            IsVisible="False"
-                            Theme="{StaticResource InputToggleButton}" />
-                        <ContentPresenter
-                            Grid.Column="4"
-                            Padding="{DynamicResource TextBoxInnerRightContentPadding}"
-                            VerticalAlignment="Center"
-                            Content="{TemplateBinding InnerRightContent}"
-                            Foreground="{DynamicResource TextBoxInnerForeground}"
-                            IsVisible="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=InnerRightContent, Converter={x:Static ObjectConverters.IsNotNull}}" />
-                    </Grid>
-                </Border>
+                    </Border>
+                </DataValidationErrors>
             </ControlTemplate>
         </Setter>
 
@@ -196,40 +359,23 @@
         <Style Selector="^:disabled">
             <Setter Property="TextBox.Foreground" Value="{DynamicResource TextBoxDisabledForeground}" />
         </Style>
-        <Style Selector="^.clearButton, ^.ClearButton">
-            <Style Selector="^[AcceptsReturn=False][IsReadOnly=False]:focus:not(:empty) /template/ Button#PART_ClearButton">
-                <Setter Property="Button.IsVisible" Value="True" />
-            </Style>
-            <Style Selector="^[AcceptsReturn=False][IsReadOnly=False]:pointerover:not(:empty) /template/ Button#PART_ClearButton">
-                <Setter Property="Button.IsVisible" Value="True" />
-            </Style>
-        </Style>
-        <Style Selector="^.revealPasswordButton, ^.RevealPasswordButton">
-            <Style Selector="^ /template/ ToggleButton#PART_RevealButton">
-                <Setter Property="ToggleButton.IsVisible" Value="True" />
-            </Style>
-        </Style>
-        <Style Selector="^.Large">
-            <Setter Property="TextBox.MinHeight" Value="{DynamicResource TextBoxWrapperLargeHeight}" />
-        </Style>
-        <Style Selector="^.Small">
-            <Setter Property="TextBox.MinHeight" Value="{DynamicResource TextBoxWrapperSmallHeight}" />
-        </Style>
 
-        <Style Selector="^.Bordered">
-            <Setter Property="TextBox.Background" Value="{DynamicResource TextBoxBorderedDefaultBackground}" />
-            <Setter Property="TextBox.BorderBrush" Value="{DynamicResource TextBoxBorderedDefaultBorderBrush}" />
+        <Style Selector="^:error">
+            <Style Selector="^ /template/ Border#PART_ContentPresenterBorder">
+                <Setter Property="Background" Value="{DynamicResource DataValidationErrorsBackground}" />
+                <Setter Property="BorderBrush" Value="Transparent" />
+            </Style>
             <Style Selector="^:pointerover /template/ Border#PART_ContentPresenterBorder">
-                <Setter Property="Border.Background" Value="{DynamicResource TextBoxBorderedPointeroverBackground}" />
-                <Setter Property="Border.BorderBrush" Value="{DynamicResource TextBoxBorderedPointeroverBorderBrush}" />
+                <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsPointerOverBackground}" />
+                <Setter Property="Border.BorderBrush" Value="Transparent" />
             </Style>
-            <Style Selector="^:focus">
-                <Setter Property="TextBox.Background" Value="{DynamicResource TextBoxBorderedPointeroverBackground}" />
-                <Setter Property="TextBox.BorderBrush" Value="{DynamicResource TextBoxBorderedPointeroverBorderBrush}" />
+            <Style Selector="^:pressed /template/ Border#PART_ContentPresenterBorder">
+                <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsPressedBackground}" />
+                <Setter Property="Border.BorderBrush" Value="Transparent" />
             </Style>
-            <Style Selector="^:disabled /template/ Border#PART_ContentPresenterBorder">
-                <Setter Property="TextBox.Background" Value="{DynamicResource TextBoxDisabledBackground}" />
-                <Setter Property="TextBox.BorderBrush" Value="{DynamicResource TextBoxDisabledBorderBrush}" />
+            <Style Selector="^:focus /template/ Border#PART_ContentPresenterBorder">
+                <Setter Property="Border.Background" Value="{DynamicResource DataValidationErrorsSelectedBackground}" />
+                <Setter Property="Border.BorderBrush" Value="{DynamicResource DataValidationErrorsSelectedBorderBrush}" />
             </Style>
         </Style>
     </ControlTheme>
diff --git a/src/Semi.Avalonia/Controls/TimePicker.axaml b/src/Semi.Avalonia/Controls/TimePicker.axaml
index 90d21a0..8041da1 100644
--- a/src/Semi.Avalonia/Controls/TimePicker.axaml
+++ b/src/Semi.Avalonia/Controls/TimePicker.axaml
@@ -129,7 +129,6 @@
     </ControlTheme>
 
     <ControlTheme x:Key="{x:Type TimePicker}" TargetType="TimePicker">
-        <Setter Property="MinHeight" Value="{DynamicResource DateTimePickerButtonDefaultHeight}" />
         <Setter Property="Foreground" Value="{DynamicResource DateTimePickerButtonForeground}" />
         <Setter Property="Background" Value="{DynamicResource DateTimePickerButtonBackground}" />
         <Setter Property="BorderBrush" Value="{DynamicResource DateTimePickerButtonBorderBrush}" />
@@ -139,106 +138,110 @@
         <Setter Property="VerticalAlignment" Value="Center" />
         <Setter Property="Template">
             <ControlTemplate>
-                <Grid Name="LayoutRoot" Margin="{TemplateBinding Padding}">
-                    <Button
-                        x:Name="PART_FlyoutButton"
-                        Width="242"
-                        MinWidth="242"
-                        HorizontalAlignment="Stretch"
-                        VerticalAlignment="Stretch"
-                        Background="{TemplateBinding Background}"
-                        BorderBrush="{TemplateBinding BorderBrush}"
-                        BorderThickness="{TemplateBinding BorderThickness}"
-                        CornerRadius="{TemplateBinding CornerRadius}"
-                        Cursor="Hand"
-                        Foreground="{TemplateBinding Foreground}"
-                        IsEnabled="{TemplateBinding IsEnabled}"
-                        Theme="{StaticResource DateTimePickerFlyoutButton}">
-                        <Grid ColumnDefinitions="*, Auto">
-                            <Grid Name="PART_FlyoutButtonContentGrid" Grid.Column="0">
-                                <!--  Ignore col defs here, set in code  -->
-                                <Border
-                                    x:Name="PART_FirstPickerHost"
-                                    Grid.Column="0"
-                                    HorizontalAlignment="Stretch"
-                                    VerticalAlignment="Stretch">
-                                    <TextBlock
-                                        x:Name="PART_HourTextBlock"
-                                        Padding="12,4"
-                                        HorizontalAlignment="Center"
-                                        VerticalAlignment="Center"
-                                        FontFamily="{TemplateBinding FontFamily}"
-                                        FontSize="{TemplateBinding FontSize}"
-                                        FontWeight="{TemplateBinding FontWeight}" />
-                                </Border>
+                <DataValidationErrors>
+                    <Grid Name="LayoutRoot" Margin="{TemplateBinding Padding}">
+                        <Button
+                            x:Name="PART_FlyoutButton"
+                            Width="242"
+                            MinWidth="242"
+                            HorizontalAlignment="Stretch"
+                            VerticalAlignment="Stretch"
+                            Background="{TemplateBinding Background}"
+                            BorderBrush="{TemplateBinding BorderBrush}"
+                            BorderThickness="{TemplateBinding BorderThickness}"
+                            CornerRadius="{TemplateBinding CornerRadius}"
+                            Cursor="Hand"
+                            DataValidationErrors.Errors="{TemplateBinding (DataValidationErrors.Errors)}"
+                            Foreground="{TemplateBinding Foreground}"
+                            IsEnabled="{TemplateBinding IsEnabled}"
+                            MinHeight="{DynamicResource DateTimePickerButtonDefaultHeight}"
+                            Theme="{StaticResource DateTimePickerFlyoutButton}">
+                            <Grid ColumnDefinitions="*, Auto">
+                                <Grid Name="PART_FlyoutButtonContentGrid" Grid.Column="0">
+                                    <!--  Ignore col defs here, set in code  -->
+                                    <Border
+                                        x:Name="PART_FirstPickerHost"
+                                        Grid.Column="0"
+                                        HorizontalAlignment="Stretch"
+                                        VerticalAlignment="Stretch">
+                                        <TextBlock
+                                            x:Name="PART_HourTextBlock"
+                                            Padding="12,4"
+                                            HorizontalAlignment="Center"
+                                            VerticalAlignment="Center"
+                                            FontFamily="{TemplateBinding FontFamily}"
+                                            FontSize="{TemplateBinding FontSize}"
+                                            FontWeight="{TemplateBinding FontWeight}" />
+                                    </Border>
 
-                                <Rectangle
-                                    Name="PART_FirstColumnDivider"
+                                    <Rectangle
+                                        Name="PART_FirstColumnDivider"
+                                        Grid.Column="1"
+                                        Width="1"
+                                        Margin="0,4"
+                                        HorizontalAlignment="Center"
+                                        Fill="{DynamicResource DateTimePickerSeparatorBackground}" />
+
+                                    <Border
+                                        x:Name="PART_SecondPickerHost"
+                                        Grid.Column="2"
+                                        HorizontalAlignment="Stretch"
+                                        VerticalAlignment="Stretch">
+                                        <TextBlock
+                                            x:Name="PART_MinuteTextBlock"
+                                            Padding="12,4"
+                                            HorizontalAlignment="Center"
+                                            VerticalAlignment="Center"
+                                            FontFamily="{TemplateBinding FontFamily}"
+                                            FontSize="{TemplateBinding FontSize}"
+                                            FontWeight="{TemplateBinding FontWeight}" />
+                                    </Border>
+
+                                    <Rectangle
+                                        Name="PART_SecondColumnDivider"
+                                        Grid.Column="3"
+                                        Width="1"
+                                        Margin="0,4"
+                                        HorizontalAlignment="Center"
+                                        Fill="{DynamicResource DateTimePickerSeparatorBackground}" />
+
+                                    <Border
+                                        x:Name="PART_ThirdPickerHost"
+                                        Grid.Column="4"
+                                        HorizontalAlignment="Stretch"
+                                        VerticalAlignment="Stretch">
+                                        <TextBlock
+                                            x:Name="PART_PeriodTextBlock"
+                                            Padding="12,4"
+                                            HorizontalAlignment="Center"
+                                            VerticalAlignment="Center"
+                                            FontFamily="{TemplateBinding FontFamily}"
+                                            FontSize="{TemplateBinding FontSize}"
+                                            FontWeight="{TemplateBinding FontWeight}" />
+                                    </Border>
+                                </Grid>
+                                <PathIcon
+                                    Name="PART_Icon"
                                     Grid.Column="1"
-                                    Width="1"
-                                    Margin="0,4"
-                                    HorizontalAlignment="Center"
-                                    Fill="{DynamicResource DateTimePickerSeparatorBackground}" />
-
-                                <Border
-                                    x:Name="PART_SecondPickerHost"
-                                    Grid.Column="2"
-                                    HorizontalAlignment="Stretch"
-                                    VerticalAlignment="Stretch">
-                                    <TextBlock
-                                        x:Name="PART_MinuteTextBlock"
-                                        Padding="12,4"
-                                        HorizontalAlignment="Center"
-                                        VerticalAlignment="Center"
-                                        FontFamily="{TemplateBinding FontFamily}"
-                                        FontSize="{TemplateBinding FontSize}"
-                                        FontWeight="{TemplateBinding FontWeight}" />
-                                </Border>
-
-                                <Rectangle
-                                    Name="PART_SecondColumnDivider"
-                                    Grid.Column="3"
-                                    Width="1"
-                                    Margin="0,4"
-                                    HorizontalAlignment="Center"
-                                    Fill="{DynamicResource DateTimePickerSeparatorBackground}" />
-
-                                <Border
-                                    x:Name="PART_ThirdPickerHost"
-                                    Grid.Column="4"
-                                    HorizontalAlignment="Stretch"
-                                    VerticalAlignment="Stretch">
-                                    <TextBlock
-                                        x:Name="PART_PeriodTextBlock"
-                                        Padding="12,4"
-                                        HorizontalAlignment="Center"
-                                        VerticalAlignment="Center"
-                                        FontFamily="{TemplateBinding FontFamily}"
-                                        FontSize="{TemplateBinding FontSize}"
-                                        FontWeight="{TemplateBinding FontWeight}" />
-                                </Border>
+                                    Width="16"
+                                    Height="16"
+                                    Margin="0,0,8,0"
+                                    Data="{DynamicResource TimePickerIconGlyph}"
+                                    Foreground="{DynamicResource DateTimePickerIconForeground}" />
                             </Grid>
-                            <PathIcon
-                                Name="PART_Icon"
-                                Grid.Column="1"
-                                Width="16"
-                                Height="16"
-                                Margin="0,0,8,0"
-                                Data="{DynamicResource TimePickerIconGlyph}"
-                                Foreground="{DynamicResource DateTimePickerIconForeground}" />
-                        </Grid>
 
-                    </Button>
+                        </Button>
 
-                    <Popup
-                        Name="PART_Popup"
-                        IsLightDismissEnabled="True"
-                        Placement="Bottom"
-                        PlacementTarget="{TemplateBinding}"
-                        WindowManagerAddShadowHint="False">
-                        <TimePickerPresenter Name="PART_PickerPresenter" />
-                    </Popup>
-                </Grid>
+                        <Popup
+                            Name="PART_Popup"
+                            IsLightDismissEnabled="True"
+                            Placement="Bottom"
+                            PlacementTarget="{TemplateBinding}"
+                            WindowManagerAddShadowHint="False">
+                            <TimePickerPresenter Name="PART_PickerPresenter" />
+                        </Popup>
+                    </Grid>
+                </DataValidationErrors>
             </ControlTemplate>
         </Setter>
 
@@ -250,10 +253,10 @@
             <Setter Property="Foreground" Value="{DynamicResource DateTimePickerEmptyForeground}" />
         </Style>
 
-        <Style Selector="^.Large">
+        <Style Selector="^.Large /template/ Button#PART_FlyoutButton">
             <Setter Property="MinHeight" Value="{DynamicResource DateTimePickerButtonLargeHeight}" />
         </Style>
-        <Style Selector="^.Small">
+        <Style Selector="^.Small /template/ Button#PART_FlyoutButton">
             <Setter Property="MinHeight" Value="{DynamicResource DateTimePickerButtonSmallHeight}" />
         </Style>
     </ControlTheme>
diff --git a/src/Semi.Avalonia/Themes/Dark/Dark.axaml b/src/Semi.Avalonia/Themes/Dark/Dark.axaml
index 7815e35..b588cdd 100644
--- a/src/Semi.Avalonia/Themes/Dark/Dark.axaml
+++ b/src/Semi.Avalonia/Themes/Dark/Dark.axaml
@@ -13,6 +13,7 @@
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Dark/Carousel.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Dark/CheckBox.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Dark/ComboBox.axaml" />
+        <ResourceInclude Source="avares://Semi.Avalonia/Themes/Dark/DataValidationErrors.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Dark/DatePicker.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Dark/DateTimePickerShared.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Dark/DropDownButton.axaml" />
diff --git a/src/Semi.Avalonia/Themes/Dark/DataValidationErrors.axaml b/src/Semi.Avalonia/Themes/Dark/DataValidationErrors.axaml
new file mode 100644
index 0000000..a54f303
--- /dev/null
+++ b/src/Semi.Avalonia/Themes/Dark/DataValidationErrors.axaml
@@ -0,0 +1,12 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <!--  Add Resources Here  -->
+    <SolidColorBrush x:Key="DataValidationErrorsForeground" Color="#FFFC725A" />
+    <SolidColorBrush x:Key="DataValidationErrorsBackground" Opacity="0.2" Color="#FFFC725A" />
+    <SolidColorBrush x:Key="DataValidationErrorsBorderBrush" Opacity="0.2" Color="#FFFC725A" />
+    <SolidColorBrush x:Key="DataValidationErrorsPointerOverBackground" Opacity="0.3" Color="#FFFC725A" />
+    <SolidColorBrush x:Key="DataValidationErrorsPointerOverBorderBrush" Opacity="0.3" Color="#FFFC725A" />
+    <SolidColorBrush x:Key="DataValidationErrorsPressedBackground" Opacity="0.4" Color="#FFFC725A" />
+    <SolidColorBrush x:Key="DataValidationErrorsPressedBorderBrush" Opacity="0.4" Color="#FFFC725A" />
+    <SolidColorBrush x:Key="DataValidationErrorsSelectedBackground" Opacity="0.2" Color="#FFFC725A" />
+    <SolidColorBrush x:Key="DataValidationErrorsSelectedBorderBrush" Color="#FFFC725A" />
+</ResourceDictionary>
diff --git a/src/Semi.Avalonia/Themes/Light/DataValidationErrors.axaml b/src/Semi.Avalonia/Themes/Light/DataValidationErrors.axaml
new file mode 100644
index 0000000..95dfb36
--- /dev/null
+++ b/src/Semi.Avalonia/Themes/Light/DataValidationErrors.axaml
@@ -0,0 +1,12 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <!--  Add Resources Here  -->
+    <SolidColorBrush x:Key="DataValidationErrorsForeground" Color="#FFF93920" />
+    <SolidColorBrush x:Key="DataValidationErrorsBackground" Color="#FFFEF2ED" />
+    <SolidColorBrush x:Key="DataValidationErrorsBorderBrush" Color="#FFFEF2ED" />
+    <SolidColorBrush x:Key="DataValidationErrorsPointerOverBackground" Color="#FFFEDDD2" />
+    <SolidColorBrush x:Key="DataValidationErrorsPointerOverBorderBrush" Color="#FFFEDDD2" />
+    <SolidColorBrush x:Key="DataValidationErrorsPressedBackground" Color="#FFFDB7A5" />
+    <SolidColorBrush x:Key="DataValidationErrorsPressedBorderBrush" Color="#FFFDB7A5" />
+    <SolidColorBrush x:Key="DataValidationErrorsSelectedBackground" Color="#FFFEF2ED" />
+    <SolidColorBrush x:Key="DataValidationErrorsSelectedBorderBrush" Color="#FFF93920" />
+</ResourceDictionary>
diff --git a/src/Semi.Avalonia/Themes/Light/Light.axaml b/src/Semi.Avalonia/Themes/Light/Light.axaml
index d456bae..2116c6b 100644
--- a/src/Semi.Avalonia/Themes/Light/Light.axaml
+++ b/src/Semi.Avalonia/Themes/Light/Light.axaml
@@ -12,6 +12,7 @@
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Light/Carousel.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Light/CheckBox.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Light/ComboBox.axaml" />
+        <ResourceInclude Source="avares://Semi.Avalonia/Themes/Light/DataValidationErrors.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Light/DatePicker.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Light/DateTimePickerShared.axaml" />
         <ResourceInclude Source="avares://Semi.Avalonia/Themes/Light/DropDownButton.axaml" />