如何在另一个线程中访问GUI-Elements？

using System;
using System.Threading;
using System.Windows;
using System.Windows.Threading;

public class Program
{
    private static Window mainWindow;

    public static void Main()
    {
        // 创建并显示主窗口
        mainWindow = new Window();
        mainWindow.Title = "GUI访问示例";
        mainWindow.Content = new Button { Content = "点击我", Width = 100, Height = 50 };
        mainWindow.Loaded += MainWindow_Loaded;
        mainWindow.ShowDialog();
    }

    private static void MainWindow_Loaded(object sender, RoutedEventArgs e)
    {
        // 创建一个新线程并在其中访问GUI元素
        Thread thread = new Thread(UpdateGUI);
        thread.Start();
    }

    private static void UpdateGUI()
    {
        // 在后台线程中访问GUI元素
        Application.Current.Dispatcher.Invoke(() =>
        {
            // 更新GUI元素的内容
            Button button = (Button)mainWindow.Content;
            button.Content = "已更新";
        });
    }
}

using System;
using System.Threading;
using System.Windows;
using System.Windows.Controls;

public class Program
{
    private static Window mainWindow;

    public static void Main()
    {
        // 创建并显示主窗口
        mainWindow = new Window();
        mainWindow.Title = "GUI访问示例";
        mainWindow.Content = new Button { Content = "点击我", Width = 100, Height = 50 };
        mainWindow.Loaded += MainWindow_Loaded;
        mainWindow.ShowDialog();
    }

    private static void MainWindow_Loaded(object sender, RoutedEventArgs e)
    {
        // 创建一个新线程并在其中访问GUI元素
        Thread thread = new Thread(UpdateGUI);
        thread.Start();
    }

    private static void UpdateGUI()
    {
        // 在后台线程中访问GUI元素
        mainWindow.Dispatcher.Invoke(() =>
        {
            // 更新GUI元素的内容
            Button button = (Button)mainWindow.Content;
            button.Content = "已更新";
        });
    }
}