diff --git a/src/WPFEduSolution/WPFBeginner/App.xaml b/src/WPFEduSolution/WPFBeginner/App.xaml
index 502643e..f239d22 100644
--- a/src/WPFEduSolution/WPFBeginner/App.xaml
+++ b/src/WPFEduSolution/WPFBeginner/App.xaml
@@ -3,7 +3,7 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:service="clr-namespace:WPFBeginner.Services"
              xmlns:conv="clr-namespace:WPFBeginner.Converters"
-             StartupUri="/Views/MainWindow.xaml">
+             Startup="Application_Startup">
     <Application.Resources>
         <ResourceDictionary>
             <service:ViewModelLocator x:Key="ViewModelLocator"/>
diff --git a/src/WPFEduSolution/WPFBeginner/App.xaml.cs b/src/WPFEduSolution/WPFBeginner/App.xaml.cs
index 6e9bd5b..49d7ffc 100644
--- a/src/WPFEduSolution/WPFBeginner/App.xaml.cs
+++ b/src/WPFEduSolution/WPFBeginner/App.xaml.cs
@@ -26,38 +26,34 @@ namespace WPFBeginner
 
         public static AppSettings Config { get; private set; }
 
-        //[STAThread]
-        //static void Main()
-        //{
-            //try
-            //{
-            //    var application = new App();
-            //    application.InitializeComponent(); // For resouce load.
-            //    application.Run();
-            //}
-            //catch (AlreadyExcutedAppException ex)
-            //{
-            //    MessageBox.Show("이미 실행중입니다. 종료 후, 다시 실행해주세요");
-            //}
-            //catch (LoginFailedException ex)
-            //{
-            //    // Do not anything;
-            //}
-            //catch (Exception ex)
-            //{
-            //    // log
-            //}
-        //}
-
-        protected override void OnStartup(StartupEventArgs e)
+        private void Application_Startup(object sender, StartupEventArgs e)
         {
-            base.OnStartup(e);
-
-            //Login();
             InitializeService();
+            var main = new MainWindow();
+            App.Current.MainWindow = main;
+            try
+            {
+                Login();
+
+                Application.Current.ShutdownMode = ShutdownMode.OnMainWindowClose;
+                App.Current.MainWindow.Show();
+            }
+            catch(Exception ex)
+            {
+                App.Current.MainWindow.Close();
+                Environment.Exit(0);
+            }
         }
 
-        private void InitializeService()
+        private void UnhandledExceptionHandle(object e)
+        {
+            if(e is UnhandledExceptionEventArgs uee && uee.ExceptionObject is LoginFailedException)
+            {
+
+            }
+        }
+
+        private static void InitializeService()
         {
             Config = JsonSerializer.Deserialize<AppSettings>(File.ReadAllText("appsettings.json"));
 
@@ -78,22 +74,22 @@ namespace WPFBeginner
                 .BuildServiceProvider());
         }
 
-        private void SetTheme(string code)
+        private static void SetTheme(string code)
         {
             if (_currentTheme != null)
-                Resources.MergedDictionaries.Remove(_currentTheme);
+                App.Current.Resources.MergedDictionaries.Remove(_currentTheme);
 
             _currentTheme = ResourceExplorer.GetThemeResourceDic(code);
-            Resources.MergedDictionaries.Add(_currentTheme);
+            App.Current.Resources.MergedDictionaries.Add(_currentTheme);
         }
 
-        private void SetLanguage(string code)
+        private static void SetLanguage(string code)
         {
             if (_currentLanguage != null)
-                Resources.MergedDictionaries.Remove( _currentLanguage );
+                App.Current.Resources.MergedDictionaries.Remove( _currentLanguage );
 
             _currentLanguage = ResourceExplorer.GetLanguageResourceDic(code);
-            Resources.MergedDictionaries.Add(_currentLanguage);
+            App.Current.Resources.MergedDictionaries.Add(_currentLanguage);
         }
 
         private static void Login()
@@ -101,9 +97,10 @@ namespace WPFBeginner
             var login = new LoginWindow();
             var isSuccess = login.ShowDialog();
 
-            if (isSuccess !=  true)
+            if (isSuccess != true)
                 throw new LoginFailedException();
         }
     }
 
 }
+
diff --git a/src/WPFEduSolution/WPFBeginner/Configurations/AppSettings.cs b/src/WPFEduSolution/WPFBeginner/Configurations/AppSettings.cs
index 45a9963..d58bf69 100644
--- a/src/WPFEduSolution/WPFBeginner/Configurations/AppSettings.cs
+++ b/src/WPFEduSolution/WPFBeginner/Configurations/AppSettings.cs
@@ -48,7 +48,7 @@ namespace WPFBeginner.Configurations
             {
                 var eventArg = new StringChangedEventArg()
                 {
-                    Old = language,
+                    Old = theme,
                     New = value
                 };
 
diff --git a/src/WPFEduSolution/WPFBeginner/Controls/MemberInputPanel.xaml b/src/WPFEduSolution/WPFBeginner/Controls/MemberInputPanel.xaml
index 243b793..b6f1aca 100644
--- a/src/WPFEduSolution/WPFBeginner/Controls/MemberInputPanel.xaml
+++ b/src/WPFEduSolution/WPFBeginner/Controls/MemberInputPanel.xaml
@@ -39,10 +39,10 @@
             <ColumnDefinition Width="*"/>
         </Grid.ColumnDefinitions>
 
-        <Label Grid.Row="0" Style="{StaticResource LabelTitle}" Content="{StaticResource Cultures.MainWindow.Label.Name}"/>
-        <Label Grid.Row="1" Style="{StaticResource LabelTitle}" Content="{StaticResource Cultures.MainWindow.Label.Call}" />
-        <Label Grid.Row="2" Style="{StaticResource LabelTitle}" Content="{StaticResource Cultures.MainWindow.Label.No}"/>
-        <Label Grid.Row="3" Style="{StaticResource LabelTitle}" Content="{StaticResource Cultures.MainWindow.Label.Mail}"/>
+        <Label Grid.Row="0" Style="{StaticResource LabelTitle}" Content="{DynamicResource Cultures.MainWindow.Label.Name}"/>
+        <Label Grid.Row="1" Style="{StaticResource LabelTitle}" Content="{DynamicResource Cultures.MainWindow.Label.Call}" />
+        <Label Grid.Row="2" Style="{StaticResource LabelTitle}" Content="{DynamicResource Cultures.MainWindow.Label.No}"/>
+        <Label Grid.Row="3" Style="{StaticResource LabelTitle}" Content="{DynamicResource Cultures.MainWindow.Label.Mail}"/>
 
         <TextBox Grid.Row="0" Grid.Column="1" Style="{StaticResource InputBox}" Text="{Binding ElementName=root, Path=MemberName}"/>
         <TextBox Grid.Row="1" Grid.Column="1" Style="{StaticResource InputBox}" Text="{Binding ElementName=root, Path=Call}"/>
diff --git a/src/WPFEduSolution/WPFBeginner/Exceptions/AlreadyExcutedAppException.cs b/src/WPFEduSolution/WPFBeginner/Exceptions/AlreadyExcutedAppException.cs
deleted file mode 100644
index 0e5aabf..0000000
--- a/src/WPFEduSolution/WPFBeginner/Exceptions/AlreadyExcutedAppException.cs
+++ /dev/null
@@ -1,16 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace WPFBeginner.Exceptions
-{
-    internal class AlreadyExcutedAppException : Exception
-    {
-        public AlreadyExcutedAppException() : base()
-        {
-            
-        }
-    }
-}
diff --git a/src/WPFEduSolution/WPFBeginner/ViewModels/MainWindowViewModel.cs b/src/WPFEduSolution/WPFBeginner/ViewModels/MainWindowViewModel.cs
index e063474..186acc2 100644
--- a/src/WPFEduSolution/WPFBeginner/ViewModels/MainWindowViewModel.cs
+++ b/src/WPFEduSolution/WPFBeginner/ViewModels/MainWindowViewModel.cs
@@ -82,28 +82,6 @@ namespace WPFBeginner.ViewModels
             }
         }
 
-        private bool isKorean;
-        public bool IsKorean
-        {
-            get => isKorean;
-            set
-            {
-                SetProperty(ref isKorean, value);
-                App.Config.Language = value ? "ko-KR" : "en-US";
-            }
-        }
-
-        private bool isDefaultTheme;
-        public bool IsDefaultTheme
-        {
-            get => isDefaultTheme;
-            set
-            {
-                SetProperty(ref isDefaultTheme, value);
-                App.Config.Theme = value ? "DefaultTheme" : "LightTheme";
-            }
-        }
-
         public ICommand SearchClickCommand => new RelayCommand(() =>
         {
             var errorMessage = ValidateSearchValues();
@@ -114,7 +92,6 @@ namespace WPFBeginner.ViewModels
                 return;
             }
 
-
             IEnumerable<Member> result = Members;    
 
             if (!string.IsNullOrWhiteSpace(MemberName))
@@ -137,6 +114,46 @@ namespace WPFBeginner.ViewModels
             OnPropertyChanged(nameof(Members));
         });
 
+        public ICommand CloseCommand => new RelayCommand<Window>(window => window.Close());
+
+        public ICommand MinimizeCommand => new RelayCommand<Window>(window => window.WindowState = WindowState.Minimized);
+
+        public ICommand MaximizeCommad => new RelayCommand<Window>(window =>
+        {
+            switch (window.WindowState)
+            {
+                case WindowState.Maximized:
+                    window.WindowState = WindowState.Normal;
+                    break;
+
+                case WindowState.Normal:
+                    window.WindowState = WindowState.Maximized;
+                    break;
+            }
+        });
+
+        public bool IsKorean => App.Config.Language.Equals("ko-KR", StringComparison.OrdinalIgnoreCase);
+        public bool IsEnglish => App.Config.Language.Equals("en-US", StringComparison.OrdinalIgnoreCase);
+
+
+        public ICommand LangueChangeCommand => new RelayCommand<string>(code =>
+        {
+            App.Config.Language = code;
+            OnPropertyChanged(nameof(IsKorean));
+            OnPropertyChanged(nameof(IsEnglish));
+        });
+
+
+
+        public bool IsDefaultTheme => App.Config.Theme.Equals("DefaultTheme", StringComparison.OrdinalIgnoreCase);
+        public bool IsLightTheme => App.Config.Theme.Equals("LightTheme", StringComparison.OrdinalIgnoreCase);
+
+        public ICommand ThemeChangeCommand => new RelayCommand<string>(code =>
+        {
+            App.Config.Theme = code;
+            OnPropertyChanged(nameof(IsDefaultTheme));
+            OnPropertyChanged(nameof(IsLightTheme));
+        });
 
         private string ValidateSearchValues()
         {
@@ -186,8 +203,6 @@ namespace WPFBeginner.ViewModels
         {
             CreateDefaultMember();
             searchModel = new Member();
-            isKorean = App.Config.Language.Equals("ko-KR", StringComparison.OrdinalIgnoreCase);
-            isDefaultTheme = App.Config.Theme.Equals("DefaultTheme", StringComparison.OrdinalIgnoreCase);
         }
 
         private void CreateDefaultMember()
diff --git a/src/WPFEduSolution/WPFBeginner/ViewModels/RegistMemberWindowViewModel.cs b/src/WPFEduSolution/WPFBeginner/ViewModels/RegistMemberWindowViewModel.cs
index 5c06a84..8b31d2d 100644
--- a/src/WPFEduSolution/WPFBeginner/ViewModels/RegistMemberWindowViewModel.cs
+++ b/src/WPFEduSolution/WPFBeginner/ViewModels/RegistMemberWindowViewModel.cs
@@ -37,6 +37,8 @@ namespace WPFBeginner.ViewModels
             window.DialogResult = false;
         });
 
+
+
         private string Validate()
         {
             if (string.IsNullOrWhiteSpace(MemberName) || string.IsNullOrWhiteSpace(EmployeeNo))
@@ -44,5 +46,7 @@ namespace WPFBeginner.ViewModels
 
             return null;
         }
+
+
     }
 }
diff --git a/src/WPFEduSolution/WPFBeginner/Views/LoginWindow.xaml b/src/WPFEduSolution/WPFBeginner/Views/LoginWindow.xaml
index bea2b64..379837e 100644
--- a/src/WPFEduSolution/WPFBeginner/Views/LoginWindow.xaml
+++ b/src/WPFEduSolution/WPFBeginner/Views/LoginWindow.xaml
@@ -66,7 +66,7 @@
                             <ColumnDefinition Width="40"/>
                             <ColumnDefinition Width="*"/>
                         </Grid.ColumnDefinitions>
-                        <Label Grid.ColumnSpan="2" Content="{StaticResource Cultures.LoginWindow.Inform}" Margin="15,0" FontSize="24" HorizontalAlignment="Left" VerticalAlignment="Center" FontWeight="Bold" FontFamily="Noto Sans CJK KR Medium" Foreground="Black" />
+                        <Label Grid.ColumnSpan="2" Content="{DynamicResource Cultures.LoginWindow.Inform}" Margin="15,0" FontSize="24" HorizontalAlignment="Left" VerticalAlignment="Center" FontWeight="Bold" FontFamily="Noto Sans CJK KR Medium" Foreground="Black" />
                         <Image Grid.Row="1" Grid.Column="0" Source="/Resources/Images/ico_user.png" Margin="10"/>
                         <TextBox Grid.Row="1" Grid.Column="1" Name="TB_User" Text="{Binding User}" Margin="5,5,15,0" FontSize="14" 
                                  Background="#7FFFFFFF" VerticalContentAlignment="Center" Padding="10,0,0,0" 
@@ -76,7 +76,7 @@
                                      sv:PasswordBoxAssistant.BoundPassword="{Binding Path=Password, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="5,5,15,0" 
                                      FontSize="14" Background="#7FFFFFFF" VerticalContentAlignment="Center" Padding="10,0,0,0" IsTabStop="True" TabIndex="2"/>
                         <Grid Grid.Row="3" Grid.ColumnSpan="2">
-                            <Button Style="{StaticResource LoginButtonStyle}" Content="{StaticResource Cultures.LoginWindow.LoginButtonText}" Margin="100,5" Background="#FFFF7575" FontSize="14" Foreground="White" FontWeight="Bold"
+                            <Button Style="{StaticResource LoginButtonStyle}" Content="{DynamicResource Cultures.LoginWindow.LoginButtonText}" Margin="100,5" Background="#FFFF7575" FontSize="14" Foreground="White" FontWeight="Bold"
                                     Command="{Binding LoginClickCommand}" CommandParameter="{Binding ElementName=root}" IsTabStop="True" TabIndex="3"/>
                         </Grid>
                     </Grid>
diff --git a/src/WPFEduSolution/WPFBeginner/Views/MainWindow.xaml b/src/WPFEduSolution/WPFBeginner/Views/MainWindow.xaml
index 57e1222..58355e2 100644
--- a/src/WPFEduSolution/WPFBeginner/Views/MainWindow.xaml
+++ b/src/WPFEduSolution/WPFBeginner/Views/MainWindow.xaml
@@ -4,7 +4,7 @@
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:uc="clr-namespace:WPFBeginner.Controls"
-        WindowStyle="None" ResizeMode="CanResize"
+        WindowStyle="None" ResizeMode="CanResize" Name="root"
         mc:Ignorable="d" Title="MainWindow" Height="500" Width="400" Padding="20">
     
     <WindowChrome.WindowChrome>
@@ -16,6 +16,7 @@
     </Window.DataContext>
 
     <Window.Resources>
+        
         <Style x:Key="SearchButton" TargetType="Button">
             <Setter Property="Background" Value="{DynamicResource Colors.SearchButton.Background.Normal}"/>
             <Setter Property="BorderBrush" Value="{DynamicResource Colors.SearchButton.BorderBrush.Normal}"/>
@@ -58,14 +59,14 @@
                 <ColumnDefinition Width="*"/>
                 <ColumnDefinition Width="Auto"/>
             </Grid.ColumnDefinitions>
-            <Label Content="{StaticResource Cultures.MainWindow.Title}" Foreground="{StaticResource Colors.TitleBar.Title.Foreground}"
+            <Label Content="{DynamicResource Cultures.MainWindow.Title}" Foreground="{DynamicResource Colors.TitleBar.Title.Foreground}"
                    FontSize="14" FontFamily="NanumSquareOTF_ac Bold" VerticalContentAlignment="Center" Padding="10 0"/>
             <Grid Grid.Column="2">
                 <StackPanel Orientation="Horizontal" WindowChrome.IsHitTestVisibleInChrome="True" VerticalAlignment="Top">
                     <ToggleButton Width="22" Height="22" Style="{DynamicResource SettingButtonStyle}" Name="bt_settings"/>
-                    <Button Width="39" Height="27" Style="{DynamicResource TiTleBarMinimizeButton}" Command="{Binding MinimizeCommand}"/>
-                    <Button Width="39" Height="27" Style="{DynamicResource TiTleBarMaximizeButton}" Command="{Binding MaximizeCommad}"/>
-                    <Button Width="39" Height="27" Style="{DynamicResource TiTleBarCloseButton}" Command="{Binding CloseCommand}"/>
+                    <Button Width="39" Height="27" Style="{DynamicResource TiTleBarMinimizeButton}" Command="{Binding MinimizeCommand}" CommandParameter="{Binding ElementName=root}"/>
+                    <Button Width="39" Height="27" Style="{DynamicResource TiTleBarMaximizeButton}" Command="{Binding MaximizeCommad}" CommandParameter="{Binding ElementName=root}"/>
+                    <Button Width="39" Height="27" Style="{DynamicResource TiTleBarCloseButton}" Command="{Binding CloseCommand}" CommandParameter="{Binding ElementName=root}"/>
                 </StackPanel>
                 <Popup PlacementTarget="{Binding ElementName=bt_settings}" Placement="Bottom"  IsOpen="{Binding ElementName=bt_settings, Path=IsChecked}" StaysOpen="False">
                     <Border Background="{DynamicResource Colors.SettingPopup.Background}" BorderThickness="1" BorderBrush="{DynamicResource Colors.SettingPopup.BorderBrush}" >
@@ -78,20 +79,23 @@
                                 </Grid.RowDefinitions>
                                 
                                 <StackPanel>
-                                    <RadioButton Content="한글판" Foreground="{DynamicResource Colors.SettingPopup.Foreground}" GroupName="Cultures" IsChecked="{Binding IsKorean}"/>
-                                    <RadioButton Content="English" Foreground="{DynamicResource Colors.SettingPopup.Foreground}" GroupName="Cultures" IsChecked="{Binding IsKorean, Converter={StaticResource InverseBoolConverter}}"/>
+                                    <RadioButton Content="한글판" Foreground="{DynamicResource Colors.SettingPopup.Foreground}" 
+                                                 GroupName="Cultures" IsChecked="{Binding IsKorean, Mode=OneWay}" Command="{Binding LangueChangeCommand}" CommandParameter="ko-KR"/>
+                                    <RadioButton Content="English" Foreground="{DynamicResource Colors.SettingPopup.Foreground}" 
+                                                 GroupName="Cultures" IsChecked="{Binding IsEnglish, Mode=OneWay}" Command="{Binding LangueChangeCommand}" CommandParameter="en-US"/>
                                 </StackPanel>
 
                                 <StackPanel Grid.Row="2">
-                                    <RadioButton Content="Dark" Foreground="{DynamicResource Colors.SettingPopup.Foreground}" GroupName="Themes"/>
-                                    <RadioButton Content="Light" Foreground="{DynamicResource Colors.SettingPopup.Foreground}" GroupName="Themes"/>
+                                    <RadioButton Content="Default" Foreground="{DynamicResource Colors.SettingPopup.Foreground}" GroupName="Themes"
+                                                 IsChecked="{Binding IsDefaultTheme, Mode=OneWay}" Command="{Binding ThemeChangeCommand}" CommandParameter="DefaultTheme"/>
+                                    <RadioButton Content="Light" Foreground="{DynamicResource Colors.SettingPopup.Foreground}" GroupName="Themes"
+                                                 IsChecked="{Binding IsLightTheme, Mode=OneWay}" Command="{Binding ThemeChangeCommand}" CommandParameter="LightTheme"/>
                                 </StackPanel>
                             </Grid>
                         </StackPanel>
                     </Border>
                 </Popup>
             </Grid>
-
         </Grid>
         <Border  HorizontalAlignment="Stretch" VerticalAlignment="Bottom" BorderThickness="0.5" BorderBrush="{DynamicResource Colors.Section.HorizontalSeperator}"/>
         
@@ -112,7 +116,7 @@
                             Command="{Binding SearchClickCommand}">
                         <StackPanel VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
                             <Image Source="/Resources/Images/btn_search_001.png" Stretch="UniformToFill"/>
-                            <Label Content="{StaticResource Cultures.MainWindow.Button.Search}" 
+                            <Label Content="{DynamicResource Cultures.MainWindow.Button.Search}" 
                                    Foreground="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType=Button}}"
                                    HorizontalAlignment="Center" FontFamily="Yu Gothic UI" FontWeight="Bold" FontSize="12" Margin="0" Padding="0"/>
                         </StackPanel>
@@ -132,18 +136,34 @@
 
             <Grid>
                 <StackPanel Orientation="Horizontal" HorizontalAlignment="Right" Margin="10 5">
-                    <Button Content="{StaticResource Cultures.MainWindow.Button.Add}" Style="{DynamicResource DataGridEditButtonStyle}" Command="{Binding AddClickCommand}"/>
-                    <Button Content="{StaticResource Cultures.MainWindow.Button.Delete}" Style="{DynamicResource DataGridEditButtonStyle}" Command="{Binding DeleteClickCommand}"/>
-                    <Button Content="{StaticResource Cultures.MainWindow.Button.Init}" Style="{DynamicResource DataGridEditButtonStyle}" Command="{Binding InitClickCommand}"/>
+                    <Button Content="{DynamicResource Cultures.MainWindow.Button.Add}" Style="{DynamicResource DataGridEditButtonStyle}" Command="{Binding AddClickCommand}"/>
+                    <Button Content="{DynamicResource Cultures.MainWindow.Button.Delete}" Style="{DynamicResource DataGridEditButtonStyle}" Command="{Binding DeleteClickCommand}"/>
+                    <Button Content="{DynamicResource Cultures.MainWindow.Button.Init}" Style="{DynamicResource DataGridEditButtonStyle}" Command="{Binding InitClickCommand}"/>
                 </StackPanel>
             </Grid>
 
             <DataGrid Grid.Row="1" Margin="5" ItemsSource="{Binding Members}" SelectedItem="{Binding SelectedMember}" AutoGenerateColumns="False" IsReadOnly="True">
                 <DataGrid.Columns>
-                    <DataGridTextColumn Header="{DynamicResource Cultures.MainWindow.DatagGid.Column.Name}" Binding="{Binding Name}" Width="*"/>
-                    <DataGridTextColumn Header="{DynamicResource Cultures.MainWindow.DatagGid.Column.Call}" Binding="{Binding Call}" Width="*"/>
-                    <DataGridTextColumn Header="{DynamicResource Cultures.MainWindow.DatagGid.Column.No}" Binding="{Binding EmployeeNo}" Width="*"/>
-                    <DataGridTextColumn Header="{DynamicResource Cultures.MainWindow.DatagGid.Column.Email}" Binding="{Binding EMail}" Width="*"/>
+                    <DataGridTextColumn Binding="{Binding Name}" Width="*">
+                        <DataGridTextColumn.Header>
+                            <TextBlock Text="{DynamicResource Cultures.MainWindow.DatagGid.Column.Name}" />
+                        </DataGridTextColumn.Header>
+                    </DataGridTextColumn>
+                    <DataGridTextColumn Binding="{Binding Call}" Width="*">
+                        <DataGridTextColumn.Header>
+                            <TextBlock Text="{DynamicResource Cultures.MainWindow.DatagGid.Column.Call}" />
+                        </DataGridTextColumn.Header>
+                    </DataGridTextColumn>
+                    <DataGridTextColumn Binding="{Binding EmployeeNo}" Width="*">
+                        <DataGridTextColumn.Header>
+                            <TextBlock Text="{DynamicResource Cultures.MainWindow.DatagGid.Column.No}" />
+                        </DataGridTextColumn.Header>
+                    </DataGridTextColumn>
+                    <DataGridTextColumn Binding="{Binding EMail}" Width="*">
+                        <DataGridTextColumn.Header>
+                            <TextBlock Text="{DynamicResource Cultures.MainWindow.DatagGid.Column.Email}" />
+                        </DataGridTextColumn.Header>
+                    </DataGridTextColumn>
                 </DataGrid.Columns>
             </DataGrid>
         </Grid>
diff --git a/src/WPFEduSolution/WPFBeginner/Views/RegistMemberWindow.xaml b/src/WPFEduSolution/WPFBeginner/Views/RegistMemberWindow.xaml
index 285315e..18b0ed4 100644
--- a/src/WPFEduSolution/WPFBeginner/Views/RegistMemberWindow.xaml
+++ b/src/WPFEduSolution/WPFBeginner/Views/RegistMemberWindow.xaml
@@ -8,7 +8,7 @@
         WindowStyle="SingleBorderWindow" 
         xmlns:vm ="clr-namespace:WPFBeginner.ViewModels"
         mc:Ignorable="d" WindowStartupLocation="CenterOwner" Name="root"
-        Title="Regist" SizeToContent="WidthAndHeight" MinWidth="200" MinHeight="200" d:DesignHeight="200" d:DesignWidth="200"
+        Title="" SizeToContent="WidthAndHeight" MinWidth="350" MinHeight="200" d:DesignHeight="200" d:DesignWidth="200"
         bh:WindowBehavior.HideCloseButton="True">
     
     <Window.DataContext>