diff --git a/PacticeSolution/DataBindingSample/App.xaml b/PacticeSolution/DataBindingSample/App.xaml
new file mode 100644
index 0000000..4f4215e
--- /dev/null
+++ b/PacticeSolution/DataBindingSample/App.xaml
@@ -0,0 +1,9 @@
+<Application x:Class="DataBindingSample.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:DataBindingSample"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+         
+    </Application.Resources>
+</Application>
diff --git a/PacticeSolution/DataBindingSample/App.xaml.cs b/PacticeSolution/DataBindingSample/App.xaml.cs
new file mode 100644
index 0000000..f4f6b74
--- /dev/null
+++ b/PacticeSolution/DataBindingSample/App.xaml.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace DataBindingSample
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}
diff --git a/PacticeSolution/DataBindingSample/AssemblyInfo.cs b/PacticeSolution/DataBindingSample/AssemblyInfo.cs
new file mode 100644
index 0000000..8b5504e
--- /dev/null
+++ b/PacticeSolution/DataBindingSample/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)
+)]
diff --git a/PacticeSolution/DataBindingSample/DataBindingSample.csproj b/PacticeSolution/DataBindingSample/DataBindingSample.csproj
new file mode 100644
index 0000000..4106cb0
--- /dev/null
+++ b/PacticeSolution/DataBindingSample/DataBindingSample.csproj
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net6.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWPF>true</UseWPF>
+  </PropertyGroup>
+
+</Project>
diff --git a/PacticeSolution/DataBindingSample/MainWindow.xaml b/PacticeSolution/DataBindingSample/MainWindow.xaml
new file mode 100644
index 0000000..15483cb
--- /dev/null
+++ b/PacticeSolution/DataBindingSample/MainWindow.xaml
@@ -0,0 +1,17 @@
+<Window x:Class="DataBindingSample.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"
+        xmlns:local="clr-namespace:DataBindingSample"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="200  " Width="200">
+    <StackPanel>
+        <Label HorizontalAlignment="Center">--- By XAML Code ---</Label>
+        <TextBox x:Name="tbxByXaml" VerticalAlignment="Center"/>
+        <Label x:Name="lblByXaml" Height="30" VerticalAlignment="Center" Content="{Binding ElementName=tbxByXaml, Path=Text}"/>
+        <Label HorizontalAlignment="Center">--- By Code Behind ---</Label>
+        <TextBlock x:Name="tbxByCodeBehind"/>
+        <Label x:Name="lblByCodeBehind" Height="30" VerticalAlignment="Center"/>
+    </StackPanel>
+</Window>
diff --git a/PacticeSolution/DataBindingSample/MainWindow.xaml.cs b/PacticeSolution/DataBindingSample/MainWindow.xaml.cs
new file mode 100644
index 0000000..c84947b
--- /dev/null
+++ b/PacticeSolution/DataBindingSample/MainWindow.xaml.cs
@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+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 DataBindingSample
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        public MainWindow()
+        {
+            InitializeComponent();
+            DoBinding();
+        }
+
+        private void DoBinding()
+        {
+            Binding binding = new Binding();
+            binding.Source = tbxByCodeBehind;
+            binding.Path = new PropertyPath(tbxByCodeBehind.Text);
+            lblByCodeBehind.SetBinding(Label.ContentProperty, binding);
+        }
+    }
+}
diff --git a/PacticeSolution/MapFinder/Utility/KakaoAPI.cs b/PacticeSolution/MapFinder/Utility/KakaoAPI.cs
index 2fd3f34..c77548b 100644
--- a/PacticeSolution/MapFinder/Utility/KakaoAPI.cs
+++ b/PacticeSolution/MapFinder/Utility/KakaoAPI.cs
@@ -21,7 +21,7 @@ namespace MapFinder.Utility
             string site = "https://dapi.kakao.com/v2/local/search/keyword.json";
             string rquery = $"{site}?query={query}";
             WebRequest request = WebRequest.Create(rquery);
-            string rkey = "69747398a2142e62bfdaefbab4adbc42"; // REST API KEY
+            string rkey = ""; // REST API KEY
             string header = $"KakaoAK {rkey}";
             request.Headers.Add("Authorization", header);
 
diff --git a/PacticeSolution/PacticeSolution.sln b/PacticeSolution/PacticeSolution.sln
index 80a5dd5..8628fb2 100644
--- a/PacticeSolution/PacticeSolution.sln
+++ b/PacticeSolution/PacticeSolution.sln
@@ -3,11 +3,13 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.5.33530.505
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PacticeSolution", "PacticeSolution\PacticeSolution.csproj", "{6AE700B8-28D0-4D9F-978B-91AFB1033125}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "PacticeSolution", "PacticeSolution\PacticeSolution.csproj", "{6AE700B8-28D0-4D9F-978B-91AFB1033125}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ClockGadget", "ClockGadget\ClockGadget.csproj", "{AED102C2-9E4B-4DE6-A843-616856F687DB}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ClockGadget", "ClockGadget\ClockGadget.csproj", "{AED102C2-9E4B-4DE6-A843-616856F687DB}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MapFinder", "MapFinder\MapFinder.csproj", "{4FCEAEAA-6A26-492F-95D1-9695F386DAB5}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MapFinder", "MapFinder\MapFinder.csproj", "{4FCEAEAA-6A26-492F-95D1-9695F386DAB5}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DataBindingSample", "DataBindingSample\DataBindingSample.csproj", "{8A3E4E38-6E95-4955-8BFE-6E58F4AECE27}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -27,6 +29,10 @@ Global
 		{4FCEAEAA-6A26-492F-95D1-9695F386DAB5}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4FCEAEAA-6A26-492F-95D1-9695F386DAB5}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4FCEAEAA-6A26-492F-95D1-9695F386DAB5}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8A3E4E38-6E95-4955-8BFE-6E58F4AECE27}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8A3E4E38-6E95-4955-8BFE-6E58F4AECE27}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8A3E4E38-6E95-4955-8BFE-6E58F4AECE27}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8A3E4E38-6E95-4955-8BFE-6E58F4AECE27}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE