diff --git a/WPF基础-3-Border1/App.xaml b/WPF基础-3-Border1/App.xaml
new file mode 100644
index 0000000..096a7bd
--- /dev/null
+++ b/WPF基础-3-Border1/App.xaml
@@ -0,0 +1,9 @@
+<Application x:Class="WPF基础_2_Border1.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:WPF基础_2_Border1"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>
diff --git a/WPF基础-3-Border1/App.xaml.cs b/WPF基础-3-Border1/App.xaml.cs
new file mode 100644
index 0000000..4f4f579
--- /dev/null
+++ b/WPF基础-3-Border1/App.xaml.cs
@@ -0,0 +1,12 @@
+using System.Configuration;
+using System.Data;
+using System.Windows;
+
+namespace WPF基础_2_Border1;
+
+/// <summary>
+/// Interaction logic for App.xaml
+/// </summary>
+public partial class App : Application
+{
+}
\ No newline at end of file
diff --git a/WPF基础-3-Border1/AssemblyInfo.cs b/WPF基础-3-Border1/AssemblyInfo.cs
new file mode 100644
index 0000000..4a05c7d
--- /dev/null
+++ b/WPF基础-3-Border1/AssemblyInfo.cs
@@ -0,0 +1,10 @@
+using System.Windows;
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+    //(used if a resource is not found in the page,
+    // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+    //(used if a resource is not found in the page,
+    // app, or any theme specific resource dictionaries)
+)]
\ No newline at end of file
diff --git a/WPF基础-3-Border1/MainWindow.xaml b/WPF基础-3-Border1/MainWindow.xaml
new file mode 100644
index 0000000..4209422
--- /dev/null
+++ b/WPF基础-3-Border1/MainWindow.xaml
@@ -0,0 +1,17 @@
+<Window x:Class="WPF基础_2_Border1.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        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"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="450" Width="800">
+    <Border Margin="5" Padding="5" Background="LightYellow" BorderBrush="SteelBlue" BorderThickness="3,5,3,5"
+            CornerRadius="3" VerticalAlignment="Top">
+        <StackPanel>
+            <Button Margin="3">按钮1</Button>
+            <Button Margin="3">按钮2</Button>
+            <Button Margin="3">按钮3</Button>
+            <Button Margin="3">按钮4</Button>
+        </StackPanel>
+    </Border>
+</Window>
\ No newline at end of file
diff --git a/WPF基础-3-Border1/MainWindow.xaml.cs b/WPF基础-3-Border1/MainWindow.xaml.cs
new file mode 100644
index 0000000..9876a8d
--- /dev/null
+++ b/WPF基础-3-Border1/MainWindow.xaml.cs
@@ -0,0 +1,23 @@
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace WPF基础_2_Border1;
+
+/// <summary>
+/// Interaction logic for MainWindow.xaml
+/// </summary>
+public partial class MainWindow : Window
+{
+    public MainWindow()
+    {
+        InitializeComponent();
+    }
+}
\ No newline at end of file
diff --git a/WPF基础-3-Border1/WPF基础-3-Border1.csproj b/WPF基础-3-Border1/WPF基础-3-Border1.csproj
new file mode 100644
index 0000000..ad9dc0b
--- /dev/null
+++ b/WPF基础-3-Border1/WPF基础-3-Border1.csproj
@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>WinExe</OutputType>
+        <TargetFramework>net8.0-windows</TargetFramework>
+        <RootNamespace>WPF基础_2_Border1</RootNamespace>
+        <Nullable>enable</Nullable>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <UseWPF>true</UseWPF>
+    </PropertyGroup>
+
+</Project>
diff --git a/WPF基础.sln b/WPF基础.sln
index 809ec6c..7075e90 100644
--- a/WPF基础.sln
+++ b/WPF基础.sln
@@ -12,6 +12,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WPF基础-2-StackPanel", "W
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WPF基础-2-StackPanel2", "WPF基础-2-StackPanel2\WPF基础-2-StackPanel2.csproj", "{1D149BDE-58BF-4E85-8AC2-A689FE3E5E4D}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "WPF基础-3-Border1", "WPF基础-3-Border1\WPF基础-3-Border1.csproj", "{A30CF5E4-0A04-4CDA-9AA4-2879A70920A3}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -42,5 +44,9 @@ Global
 		{1D149BDE-58BF-4E85-8AC2-A689FE3E5E4D}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{1D149BDE-58BF-4E85-8AC2-A689FE3E5E4D}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{1D149BDE-58BF-4E85-8AC2-A689FE3E5E4D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A30CF5E4-0A04-4CDA-9AA4-2879A70920A3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A30CF5E4-0A04-4CDA-9AA4-2879A70920A3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A30CF5E4-0A04-4CDA-9AA4-2879A70920A3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A30CF5E4-0A04-4CDA-9AA4-2879A70920A3}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal