How to update I18N immediately in WPF?

Question

I make a I18N demonstration in WPF. I create two Resources.resx, one is "Resources.resx" , the other is "Resources.zh-CN.resx".

I want to change the control's text when changed CultureInfo .

Now I can load resources from Resources.XXX.resx file. but I couldn't dynamic change the contorls' text.

<Window x:Class="Demo05_I18N.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:sys="clr-namespace:System;assembly=mscorlib"
    xmlns:local="clr-namespace:Demo05_I18N"
    xmlns:prop="clr-namespace:Demo05_I18N.Properties"
    Title="MainWindow" Height="176" Width="326">
  <Window.Resources>
    <local:StringList x:Key="CultureList">
      <sys:String>zh-CN</sys:String>
      <sys:String>en</sys:String>
    </local:StringList>
  </Window.Resources>
  <Grid Margin="5">
    <Grid.Resources>
      <Style x:Key="CellControlStyle" TargetType="{x:Type Control}">
        <Setter Property="Margin" Value="5" />
      </Style>
      <Style x:Key="CellTextStyle" TargetType="{x:Type TextBlock}">
        <Setter Property="Margin" Value="5" />
      </Style>
    </Grid.Resources>
    <Grid.ColumnDefinitions>
      <ColumnDefinition Width="120"/>
      <ColumnDefinition />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
      <RowDefinition Height="Auto" />
      <RowDefinition Height="Auto" />
      <RowDefinition Height="Auto" />
      <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
    <TextBlock Name="txtLoginName" Style="{StaticResource CellTextStyle}" Grid.Row="0" Grid.Column="0" Text="{x:Static prop:Resources.LoginName}"/>
    <TextBlock Style="{StaticResource CellTextStyle}" Grid.Row="1" Grid.Column="0" Text="{x:Static prop:Resources.LoginPwd}"/>
    <TextBox Style="{StaticResource CellControlStyle}" Grid.Row="0" Grid.Column="1" />
    <TextBox Style="{StaticResource CellControlStyle}" Grid.Row="1" Grid.Column="1" />
    <Button Style="{StaticResource CellControlStyle}" Grid.Row="2" Grid.Column="1" Content="{x:Static prop:Resources.LoginButton}" />

    <TextBlock Style="{StaticResource CellTextStyle}" Grid.Row="3" Grid.Column="0" Text="{x:Static prop:Resources.SwitchCultureInfo}"/>
    <ComboBox Name="cboCulture" ItemsSource="{StaticResource CultureList}" SelectedIndex="0" Grid.Row="3" Grid.Column="1" SelectionChanged="cboCulture_SelectionChanged" />
  </Grid>
</Window>

using System.Windows;
using System.Windows.Controls;
using System.Globalization;

namespace Demo05_I18N {
  /// <summary>
  /// MainWindow.xaml 的交互逻辑
  /// </summary>
  public partial class MainWindow : Window {
    public MainWindow() {
      InitializeComponent();
    }

    private void cboCulture_SelectionChanged(object sender, SelectionChangedEventArgs e) {
      if (this.IsLoaded) {
        string sltCulture = cboCulture.SelectedItem.ToString();
        Demo05_I18N.Properties.Resources.Culture = new CultureInfo(sltCulture);
        //txtLoginName.SetValue(TextBlock.TextProperty, Demo05_I18N.Properties.Resources.LoginName);<br/>        <strong>//?How to dynamic change?</strong><br/>      }

    }
  }
}