diff --git a/Semi.Avalonia.sln b/Semi.Avalonia.sln
index 85b5a31..827c045 100644
--- a/Semi.Avalonia.sln
+++ b/Semi.Avalonia.sln
@@ -28,6 +28,10 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Semi.Avalonia.Demo.Android"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Semi.Avalonia.Demo.Drm", "demo\Semi.Avalonia.Demo.Drm\Semi.Avalonia.Demo.Drm.csproj", "{86D93406-412A-4429-93B2-92AAD0407784}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Semi.Avalonia.TreeDataGrid", "src\Semi.Avalonia.TreeDataGrid\Semi.Avalonia.TreeDataGrid.csproj", "{398D2998-0835-41F5-99A3-608CAB8051E2}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Semi.Avalonia.TreeDataGrid.Demo", "demo\Semi.Avalonia.TreeDataGrid.Demo\Semi.Avalonia.TreeDataGrid.Demo.csproj", "{6178B545-4BB6-458C-A27C-EE11F3885D38}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -67,6 +71,14 @@ Global
 		{86D93406-412A-4429-93B2-92AAD0407784}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{86D93406-412A-4429-93B2-92AAD0407784}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{86D93406-412A-4429-93B2-92AAD0407784}.Release|Any CPU.Build.0 = Release|Any CPU
+		{398D2998-0835-41F5-99A3-608CAB8051E2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{398D2998-0835-41F5-99A3-608CAB8051E2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{398D2998-0835-41F5-99A3-608CAB8051E2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{398D2998-0835-41F5-99A3-608CAB8051E2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6178B545-4BB6-458C-A27C-EE11F3885D38}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6178B545-4BB6-458C-A27C-EE11F3885D38}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6178B545-4BB6-458C-A27C-EE11F3885D38}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6178B545-4BB6-458C-A27C-EE11F3885D38}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -77,6 +89,7 @@ Global
 		{D789AEDB-EBDF-4450-8E8E-B4A03FB257B0} = {43091528-9509-43CB-A003-9C5C11E96DD6}
 		{0C81FC1C-5D2D-478A-9876-923A0C85EC2F} = {43091528-9509-43CB-A003-9C5C11E96DD6}
 		{86D93406-412A-4429-93B2-92AAD0407784} = {43091528-9509-43CB-A003-9C5C11E96DD6}
+		{6178B545-4BB6-458C-A27C-EE11F3885D38} = {43091528-9509-43CB-A003-9C5C11E96DD6}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {7CA41ED3-2CED-40CC-AA21-28C3B42B1E86}
diff --git a/demo/Semi.Avalonia.TreeDataGrid.Demo/App.axaml b/demo/Semi.Avalonia.TreeDataGrid.Demo/App.axaml
new file mode 100644
index 0000000..6ba2484
--- /dev/null
+++ b/demo/Semi.Avalonia.TreeDataGrid.Demo/App.axaml
@@ -0,0 +1,11 @@
+<Application
+    x:Class="Semi.Avalonia.TreeDataGrid.Demo.App"
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    RequestedThemeVariant="Default">
+    <!--  "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options.  -->
+
+    <Application.Styles>
+        <StyleInclude Source="avares://Semi.Avalonia.TreeDataGrid/Index.axaml" />
+    </Application.Styles>
+</Application>
\ No newline at end of file
diff --git a/demo/Semi.Avalonia.TreeDataGrid.Demo/App.axaml.cs b/demo/Semi.Avalonia.TreeDataGrid.Demo/App.axaml.cs
new file mode 100644
index 0000000..c4d36b3
--- /dev/null
+++ b/demo/Semi.Avalonia.TreeDataGrid.Demo/App.axaml.cs
@@ -0,0 +1,23 @@
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+namespace Semi.Avalonia.TreeDataGrid.Demo;
+
+public partial class App : Application
+{
+    public override void Initialize()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+
+    public override void OnFrameworkInitializationCompleted()
+    {
+        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+        {
+            desktop.MainWindow = new MainWindow();
+        }
+
+        base.OnFrameworkInitializationCompleted();
+    }
+}
\ No newline at end of file
diff --git a/demo/Semi.Avalonia.TreeDataGrid.Demo/MainWindow.axaml b/demo/Semi.Avalonia.TreeDataGrid.Demo/MainWindow.axaml
new file mode 100644
index 0000000..1c957f9
--- /dev/null
+++ b/demo/Semi.Avalonia.TreeDataGrid.Demo/MainWindow.axaml
@@ -0,0 +1,14 @@
+<Window
+    x:Class="Semi.Avalonia.TreeDataGrid.Demo.MainWindow"
+    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"
+    Title="Semi.Avalonia.TreeDataGrid.Demo"
+    d:DesignHeight="450"
+    d:DesignWidth="800"
+    mc:Ignorable="d">
+    <TreeDataGrid>
+        <TreeDataGrid.Columns />
+    </TreeDataGrid>
+</Window>
diff --git a/demo/Semi.Avalonia.TreeDataGrid.Demo/MainWindow.axaml.cs b/demo/Semi.Avalonia.TreeDataGrid.Demo/MainWindow.axaml.cs
new file mode 100644
index 0000000..0694e68
--- /dev/null
+++ b/demo/Semi.Avalonia.TreeDataGrid.Demo/MainWindow.axaml.cs
@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace Semi.Avalonia.TreeDataGrid.Demo;
+
+public partial class MainWindow : Window
+{
+    public MainWindow()
+    {
+        InitializeComponent();
+    }
+}
\ No newline at end of file
diff --git a/demo/Semi.Avalonia.TreeDataGrid.Demo/Program.cs b/demo/Semi.Avalonia.TreeDataGrid.Demo/Program.cs
new file mode 100644
index 0000000..b71cf5e
--- /dev/null
+++ b/demo/Semi.Avalonia.TreeDataGrid.Demo/Program.cs
@@ -0,0 +1,21 @@
+using Avalonia;
+using System;
+
+namespace Semi.Avalonia.TreeDataGrid.Demo;
+
+class Program
+{
+    // Initialization code. Don't use any Avalonia, third-party APIs or any
+    // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
+    // yet and stuff might break.
+    [STAThread]
+    public static void Main(string[] args) => BuildAvaloniaApp()
+        .StartWithClassicDesktopLifetime(args);
+
+    // Avalonia configuration, don't remove; also used by visual designer.
+    public static AppBuilder BuildAvaloniaApp()
+        => AppBuilder.Configure<App>()
+            .UsePlatformDetect()
+            .WithInterFont()
+            .LogToTrace();
+}
\ No newline at end of file
diff --git a/demo/Semi.Avalonia.TreeDataGrid.Demo/Semi.Avalonia.TreeDataGrid.Demo.csproj b/demo/Semi.Avalonia.TreeDataGrid.Demo/Semi.Avalonia.TreeDataGrid.Demo.csproj
new file mode 100644
index 0000000..ffa8068
--- /dev/null
+++ b/demo/Semi.Avalonia.TreeDataGrid.Demo/Semi.Avalonia.TreeDataGrid.Demo.csproj
@@ -0,0 +1,25 @@
+<Project Sdk="Microsoft.NET.Sdk">
+    <PropertyGroup>
+        <OutputType>WinExe</OutputType>
+        <TargetFramework>net6.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <BuiltInComInteropSupport>true</BuiltInComInteropSupport>
+        <ApplicationManifest>app.manifest</ApplicationManifest>
+        <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
+    </PropertyGroup>
+
+
+    <ItemGroup>
+        <PackageReference Include="Avalonia" Version="11.0.0" />
+        <PackageReference Include="Avalonia.Desktop" Version="11.0.0" />
+        <PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.0" />
+        <PackageReference Include="Avalonia.Fonts.Inter" Version="11.0.0" />
+        <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
+        <PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="11.0.0" />
+    </ItemGroup>
+
+
+    <ItemGroup>
+      <ProjectReference Include="..\..\src\Semi.Avalonia.TreeDataGrid\Semi.Avalonia.TreeDataGrid.csproj" />
+    </ItemGroup>
+</Project>
diff --git a/demo/Semi.Avalonia.TreeDataGrid.Demo/app.manifest b/demo/Semi.Avalonia.TreeDataGrid.Demo/app.manifest
new file mode 100644
index 0000000..18ebc37
--- /dev/null
+++ b/demo/Semi.Avalonia.TreeDataGrid.Demo/app.manifest
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
+  <!-- This manifest is used on Windows only.
+       Don't remove it as it might cause problems with window transparency and embeded controls.
+       For more details visit https://learn.microsoft.com/en-us/windows/win32/sbscs/application-manifests -->
+  <assemblyIdentity version="1.0.0.0" name="Semi.Avalonia.TreeDataGrid.Demo.Desktop"/>
+
+  <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+    <application>
+      <!-- A list of the Windows versions that this application has been tested on
+           and is designed to work with. Uncomment the appropriate elements
+           and Windows will automatically select the most compatible environment. -->
+
+      <!-- Windows 10 -->
+      <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
+    </application>
+  </compatibility>
+</assembly>
diff --git a/src/Semi.Avalonia.TreeDataGrid/Dark.axaml b/src/Semi.Avalonia.TreeDataGrid/Dark.axaml
new file mode 100644
index 0000000..bd82d78
--- /dev/null
+++ b/src/Semi.Avalonia.TreeDataGrid/Dark.axaml
@@ -0,0 +1,11 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <!--  Add Resources Here  -->
+    <SolidColorBrush x:Key="TreeDataGridGridLinesBrush" Color="{StaticResource SystemListLowColor}" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderBackgroundPointerOverBrush" Opacity="0.1" Color="{StaticResource SystemBaseHighColor}" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderBackgroundPressedBrush" Color="{StaticResource SystemBaseMediumLowColor}" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderBorderBrushPointerOverBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderBorderBrushPressedBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderForegroundPointerOverBrush" Color="{StaticResource SystemBaseHighColor}" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderForegroundPressedBrush" Color="{StaticResource SystemBaseHighColor}" />
+    <SolidColorBrush x:Key="TreeDataGridSelectedCellBackgroundBrush" Opacity="0.4" Color="{StaticResource SystemAccentColor}" />
+</ResourceDictionary>
diff --git a/src/Semi.Avalonia.TreeDataGrid/Index.axaml b/src/Semi.Avalonia.TreeDataGrid/Index.axaml
new file mode 100644
index 0000000..b557af1
--- /dev/null
+++ b/src/Semi.Avalonia.TreeDataGrid/Index.axaml
@@ -0,0 +1,15 @@
+<Styles xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <!--  Add Resources Here  -->
+    <Styles.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.ThemeDictionaries>
+                <MergeResourceInclude x:Key="Default" Source="avares://Semi.Avalonia.TreeDataGrid/Light.axaml" />
+                <MergeResourceInclude x:Key="Dark" Source="avares://Semi.Avalonia.TreeDataGrid/Dark.axaml" />
+            </ResourceDictionary.ThemeDictionaries>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceInclude Source="avares://Semi.Avalonia.TreeDataGrid/TreeDataGrid.axaml" />
+                <ResourceInclude Source="avares://Semi.Avalonia.TreeDataGrid/Shared.axaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Styles.Resources>
+</Styles>
diff --git a/src/Semi.Avalonia.TreeDataGrid/Light.axaml b/src/Semi.Avalonia.TreeDataGrid/Light.axaml
new file mode 100644
index 0000000..bd82d78
--- /dev/null
+++ b/src/Semi.Avalonia.TreeDataGrid/Light.axaml
@@ -0,0 +1,11 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <!--  Add Resources Here  -->
+    <SolidColorBrush x:Key="TreeDataGridGridLinesBrush" Color="{StaticResource SystemListLowColor}" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderBackgroundPointerOverBrush" Opacity="0.1" Color="{StaticResource SystemBaseHighColor}" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderBackgroundPressedBrush" Color="{StaticResource SystemBaseMediumLowColor}" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderBorderBrushPointerOverBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderBorderBrushPressedBrush" Color="Transparent" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderForegroundPointerOverBrush" Color="{StaticResource SystemBaseHighColor}" />
+    <SolidColorBrush x:Key="TreeDataGridHeaderForegroundPressedBrush" Color="{StaticResource SystemBaseHighColor}" />
+    <SolidColorBrush x:Key="TreeDataGridSelectedCellBackgroundBrush" Opacity="0.4" Color="{StaticResource SystemAccentColor}" />
+</ResourceDictionary>
diff --git a/src/Semi.Avalonia.TreeDataGrid/Semi.Avalonia.TreeDataGrid.csproj b/src/Semi.Avalonia.TreeDataGrid/Semi.Avalonia.TreeDataGrid.csproj
new file mode 100644
index 0000000..7cfd5ae
--- /dev/null
+++ b/src/Semi.Avalonia.TreeDataGrid/Semi.Avalonia.TreeDataGrid.csproj
@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net6.0</TargetFramework>
+        <LangVersion>10</LangVersion>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Avalonia.Controls.TreeDataGrid" Version="11.0.0" />
+    </ItemGroup>
+
+</Project>
diff --git a/src/Semi.Avalonia.TreeDataGrid/Shared.axaml b/src/Semi.Avalonia.TreeDataGrid/Shared.axaml
new file mode 100644
index 0000000..cd04974
--- /dev/null
+++ b/src/Semi.Avalonia.TreeDataGrid/Shared.axaml
@@ -0,0 +1,7 @@
+<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+    <!--  Add Resources Here  -->
+    <StreamGeometry x:Key="TreeDataGridSortIconDescendingPath">M1875 1011l-787 787v-1798h-128v1798l-787 -787l-90 90l941 941l941 -941z</StreamGeometry>
+    <StreamGeometry x:Key="TreeDataGridSortIconAscendingPath">M1965 947l-941 -941l-941 941l90 90l787 -787v1798h128v-1798l787 787z</StreamGeometry>
+    <StreamGeometry x:Key="TreeDataGridItemCollapsedChevronPathData">M 1,0 10,10 l -9,10 -1,-1 L 8,10 -0,1 Z</StreamGeometry>
+    <StreamGeometry x:Key="TreeDataGridItemExpandedChevronPathData">M0,1 L10,10 20,1 19,0 10,8 1,0 Z</StreamGeometry>
+</ResourceDictionary>
diff --git a/src/Semi.Avalonia.TreeDataGrid/TreeDataGrid.axaml b/src/Semi.Avalonia.TreeDataGrid/TreeDataGrid.axaml
new file mode 100644
index 0000000..c7f2555
--- /dev/null
+++ b/src/Semi.Avalonia.TreeDataGrid/TreeDataGrid.axaml
@@ -0,0 +1,319 @@
+<ResourceDictionary
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:conv="clr-namespace:Avalonia.Controls.Converters;assembly=Avalonia.Controls.TreeDataGrid">
+    <!--  Add Resources Here  -->
+    <ControlTheme x:Key="{x:Type TreeDataGrid}" TargetType="TreeDataGrid">
+        <Setter Property="Template">
+            <ControlTemplate>
+                <Border
+                    x:Name="RootBorder"
+                    Background="{TemplateBinding Background}"
+                    BorderBrush="{TemplateBinding BorderBrush}"
+                    BorderThickness="{TemplateBinding BorderThickness}"
+                    CornerRadius="{TemplateBinding CornerRadius}">
+                    <DockPanel>
+                        <ScrollViewer
+                            Name="PART_HeaderScrollViewer"
+                            DockPanel.Dock="Top"
+                            HorizontalScrollBarVisibility="Hidden"
+                            IsVisible="{TemplateBinding ShowColumnHeaders}"
+                            VerticalScrollBarVisibility="Disabled">
+                            <Border x:Name="ColumnHeadersPresenterBorder">
+                                <TreeDataGridColumnHeadersPresenter
+                                    Name="PART_ColumnHeadersPresenter"
+                                    ElementFactory="{TemplateBinding ElementFactory}"
+                                    Items="{TemplateBinding Columns}" />
+                            </Border>
+                        </ScrollViewer>
+                        <ScrollViewer Name="PART_ScrollViewer" HorizontalScrollBarVisibility="Auto">
+                            <TreeDataGridRowsPresenter
+                                Name="PART_RowsPresenter"
+                                Columns="{TemplateBinding Columns}"
+                                ElementFactory="{TemplateBinding ElementFactory}"
+                                Items="{TemplateBinding Rows}" />
+                        </ScrollViewer>
+                    </DockPanel>
+                </Border>
+            </ControlTemplate>
+        </Setter>
+
+        <Style Selector="^/template/ Border#ColumnHeadersPresenterBorder">
+            <Setter Property="BorderThickness" Value="0 0 0 1" />
+            <Setter Property="BorderBrush" Value="{DynamicResource TreeDataGridGridLinesBrush}" />
+        </Style>
+
+    </ControlTheme>
+
+    <ControlTheme x:Key="{x:Type TreeDataGridColumnHeader}" TargetType="TreeDataGridColumnHeader">
+        <Setter Property="Background" Value="Transparent" />
+        <Setter Property="MinHeight" Value="25" />
+        <Setter Property="Padding" Value="4 2" />
+        <Setter Property="VerticalContentAlignment" Value="Center" />
+        <Setter Property="Template">
+            <ControlTemplate>
+                <Border
+                    Name="DataGridBorder"
+                    Background="{TemplateBinding Background}"
+                    BorderBrush="{TemplateBinding BorderBrush}"
+                    BorderThickness="{TemplateBinding BorderThickness}"
+                    CornerRadius="{TemplateBinding CornerRadius}">
+                    <DockPanel VerticalAlignment="Stretch">
+                        <Panel DockPanel.Dock="Right" TabIndex="2">
+                            <Rectangle
+                                Width="1"
+                                HorizontalAlignment="Right"
+                                Fill="{DynamicResource TreeDataGridGridLinesBrush}" />
+                            <Thumb
+                                Name="PART_Resizer"
+                                Width="5"
+                                Background="Transparent"
+                                Cursor="SizeWestEast"
+                                DockPanel.Dock="Right"
+                                IsVisible="{TemplateBinding CanUserResize}">
+                                <Thumb.Template>
+                                    <ControlTemplate>
+                                        <Border VerticalAlignment="Stretch" Background="{TemplateBinding Background}" />
+                                    </ControlTemplate>
+                                </Thumb.Template>
+                            </Thumb>
+                        </Panel>
+                        <Path
+                            Name="SortIcon"
+                            Height="12"
+                            HorizontalAlignment="Center"
+                            VerticalAlignment="Center"
+                            DockPanel.Dock="Right"
+                            Fill="{TemplateBinding Foreground}"
+                            Stretch="Uniform"
+                            TabIndex="1" />
+                        <ContentPresenter
+                            Name="PART_ContentPresenter"
+                            Padding="{TemplateBinding Padding}"
+                            HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
+                            VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
+                            Content="{TemplateBinding Header}"
+                            ContentTemplate="{TemplateBinding ContentTemplate}"
+                            TabIndex="0">
+                            <ContentPresenter.DataTemplates>
+                                <DataTemplate DataType="x:String">
+                                    <TextBlock Text="{Binding}" TextTrimming="CharacterEllipsis" />
+                                </DataTemplate>
+                            </ContentPresenter.DataTemplates>
+                        </ContentPresenter>
+                    </DockPanel>
+                </Border>
+            </ControlTemplate>
+        </Setter>
+
+        <Style Selector="^:pointerover /template/ Border#DataGridBorder">
+            <Setter Property="Background" Value="{DynamicResource TreeDataGridHeaderBackgroundPointerOverBrush}" />
+            <Setter Property="BorderBrush" Value="{DynamicResource TreeDataGridHeaderBorderBrushPointerOverBrush}" />
+            <Setter Property="TextBlock.Foreground" Value="{DynamicResource TreeDataGridHeaderForegroundPointerOverBrush}" />
+        </Style>
+
+        <Style Selector="^:pressed /template/ Border#DataGridBorder">
+            <Setter Property="Background" Value="{DynamicResource TreeDataGridHeaderBackgroundPressedBrush}" />
+            <Setter Property="BorderBrush" Value="{DynamicResource TreeDataGridHeaderBorderBrushPressedBrush}" />
+            <Setter Property="TextBlock.Foreground" Value="{DynamicResource TreeDataGridHeaderForegroundPressedBrush}" />
+        </Style>
+
+        <Style Selector="^[SortDirection=Ascending] /template/ Path#SortIcon">
+            <Setter Property="IsVisible" Value="True" />
+            <Setter Property="Data" Value="{DynamicResource TreeDataGridSortIconAscendingPath}" />
+        </Style>
+
+        <Style Selector="^[SortDirection=Descending] /template/ Path#SortIcon">
+            <Setter Property="IsVisible" Value="True" />
+            <Setter Property="Data" Value="{DynamicResource TreeDataGridSortIconDescendingPath}" />
+        </Style>
+
+    </ControlTheme>
+
+    <ControlTheme x:Key="{x:Type TreeDataGridRow}" TargetType="TreeDataGridRow">
+        <Setter Property="Template">
+            <ControlTemplate>
+                <Border
+                    x:Name="RowBorder"
+                    Background="{TemplateBinding Background}"
+                    BorderBrush="{TemplateBinding BorderBrush}"
+                    BorderThickness="{TemplateBinding BorderThickness}"
+                    CornerRadius="{TemplateBinding CornerRadius}">
+                    <TreeDataGridCellsPresenter
+                        Name="PART_CellsPresenter"
+                        ElementFactory="{TemplateBinding ElementFactory}"
+                        Items="{TemplateBinding Columns}"
+                        Rows="{TemplateBinding Rows}" />
+                </Border>
+            </ControlTemplate>
+        </Setter>
+
+        <Style Selector="^:selected /template/ TreeDataGridCellsPresenter#PART_CellsPresenter">
+            <Setter Property="Background" Value="{DynamicResource TreeDataGridSelectedCellBackgroundBrush}" />
+        </Style>
+
+    </ControlTheme>
+
+    <ControlTheme x:Key="{x:Type TreeDataGridCheckBoxCell}" TargetType="TreeDataGridCheckBoxCell">
+        <Setter Property="Padding" Value="4 2" />
+        <Setter Property="Template">
+            <ControlTemplate>
+                <Border
+                    x:Name="CellBorder"
+                    Padding="{TemplateBinding Padding}"
+                    Background="{TemplateBinding Background}"
+                    BorderBrush="{TemplateBinding BorderBrush}"
+                    BorderThickness="{TemplateBinding BorderThickness}"
+                    CornerRadius="{TemplateBinding CornerRadius}">
+                    <CheckBox
+                        IsChecked="{TemplateBinding Value,
+                                                    Mode=TwoWay}"
+                        IsEnabled="{Binding !IsReadOnly, RelativeSource={RelativeSource TemplatedParent}}"
+                        IsThreeState="{TemplateBinding IsThreeState}" />
+                </Border>
+            </ControlTemplate>
+        </Setter>
+    </ControlTheme>
+
+    <ControlTheme x:Key="TreeDataGridExpandCollapseChevron" TargetType="ToggleButton">
+        <Setter Property="Margin" Value="0" />
+        <Setter Property="Width" Value="12" />
+        <Setter Property="Height" Value="12" />
+        <Setter Property="Template">
+            <ControlTemplate>
+                <Border
+                    Width="{TemplateBinding Width}"
+                    Height="{TemplateBinding Height}"
+                    HorizontalAlignment="Center"
+                    VerticalAlignment="Center"
+                    Background="Transparent">
+                    <Path
+                        x:Name="ChevronPath"
+                        HorizontalAlignment="Center"
+                        VerticalAlignment="Center"
+                        Data="{DynamicResource TreeDataGridItemCollapsedChevronPathData}"
+                        Fill="{TemplateBinding Foreground}"
+                        Stretch="Uniform" />
+                </Border>
+            </ControlTemplate>
+        </Setter>
+        <Style Selector="^:checked /template/ Path#ChevronPath">
+            <Setter Property="Data" Value="{DynamicResource TreeDataGridItemExpandedChevronPathData}" />
+        </Style>
+    </ControlTheme>
+
+    <ControlTheme x:Key="{x:Type TreeDataGridExpanderCell}" TargetType="TreeDataGridExpanderCell">
+        <Setter Property="Template">
+            <ControlTemplate>
+                <Border
+                    x:Name="CellBorder"
+                    Padding="{TemplateBinding Indent,
+                                              Converter={x:Static conv:IndentConverter.Instance}}"
+                    Background="{TemplateBinding Background}"
+                    BorderBrush="{TemplateBinding BorderBrush}"
+                    BorderThickness="{TemplateBinding BorderThickness}"
+                    CornerRadius="{TemplateBinding CornerRadius}">
+                    <DockPanel>
+                        <Border
+                            Width="12"
+                            Height="12"
+                            Margin="4,0"
+                            DockPanel.Dock="Left">
+                            <ToggleButton
+                                Focusable="False"
+                                IsChecked="{TemplateBinding IsExpanded,
+                                                            Mode=TwoWay}"
+                                IsVisible="{TemplateBinding ShowExpander}"
+                                Theme="{StaticResource TreeDataGridExpandCollapseChevron}" />
+                        </Border>
+                        <Decorator Name="PART_Content" />
+                    </DockPanel>
+                </Border>
+            </ControlTemplate>
+        </Setter>
+    </ControlTheme>
+
+    <ControlTheme x:Key="{x:Type TreeDataGridTextCell}" TargetType="TreeDataGridTextCell">
+        <Setter Property="Padding" Value="4 2" />
+        <Setter Property="Template">
+            <ControlTemplate>
+                <Border
+                    x:Name="CellBorder"
+                    Padding="{TemplateBinding Padding}"
+                    Background="{TemplateBinding Background}"
+                    BorderBrush="{TemplateBinding BorderBrush}"
+                    BorderThickness="{TemplateBinding BorderThickness}"
+                    CornerRadius="{TemplateBinding CornerRadius}">
+                    <TextBlock
+                        VerticalAlignment="Center"
+                        Text="{TemplateBinding Value}"
+                        TextTrimming="{TemplateBinding TextTrimming}"
+                        TextWrapping="{TemplateBinding TextWrapping}" />
+                </Border>
+            </ControlTemplate>
+        </Setter>
+
+        <Style Selector="^:editing">
+            <Setter Property="Padding" Value="4 2" />
+            <Setter Property="Template">
+                <ControlTemplate>
+                    <Border
+                        x:Name="CellBorder"
+                        Padding="{TemplateBinding Padding}"
+                        Background="{TemplateBinding Background}"
+                        BorderBrush="{TemplateBinding BorderBrush}"
+                        BorderThickness="{TemplateBinding BorderThickness}"
+                        CornerRadius="{TemplateBinding CornerRadius}">
+                        <TextBox Name="PART_Edit" Text="{TemplateBinding Value, Mode=TwoWay}" />
+                    </Border>
+                </ControlTemplate>
+            </Setter>
+        </Style>
+
+        <Style Selector="^:editing /template/ TextBox#PART_Edit">
+            <Setter Property="Background" Value="Transparent" />
+            <Setter Property="MinHeight" Value="25" />
+            <Setter Property="Padding" Value="10,3,6,3" />
+            <Setter Property="VerticalAlignment" Value="Center" />
+        </Style>
+
+        <Style Selector="^:editing /template/ TextBox#PART_Edit DataValidationErrors">
+            <Setter Property="Template" Value="{DynamicResource TooltipDataValidationContentTemplate}" />
+            <Setter Property="ErrorTemplate" Value="{DynamicResource TooltipDataValidationErrorTemplate}" />
+        </Style>
+
+    </ControlTheme>
+
+    <ControlTheme x:Key="{x:Type TreeDataGridTemplateCell}" TargetType="TreeDataGridTemplateCell">
+        <Setter Property="Template">
+            <ControlTemplate>
+                <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}" />
+            </ControlTemplate>
+        </Setter>
+
+        <Style Selector="^:editing">
+            <Setter Property="Padding" Value="4 2" />
+            <Setter Property="Template">
+                <ControlTemplate>
+                    <ContentPresenter
+                        Name="PART_EditingContentPresenter"
+                        Padding="{TemplateBinding Padding}"
+                        Background="{TemplateBinding Background}"
+                        BorderBrush="{TemplateBinding BorderBrush}"
+                        BorderThickness="{TemplateBinding BorderThickness}"
+                        Content="{TemplateBinding Content}"
+                        ContentTemplate="{TemplateBinding EditingTemplate}"
+                        CornerRadius="{TemplateBinding CornerRadius}" />
+                </ControlTemplate>
+            </Setter>
+        </Style>
+    </ControlTheme>
+</ResourceDictionary>