如何从任务/线程访问TextBlock控件？

using System;
using System.Threading.Tasks;
using Windows.UI.Core;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

public class MyClass
{
    private TextBlock myTextBlock;

    public MyClass(TextBlock textBlock)
    {
        myTextBlock = textBlock;
    }

    public async Task UpdateTextBlockAsync(string text)
    {
        await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
        {
            myTextBlock.Text = text;
        });
    }
}

// 在其他地方创建TextBlock控件的实例
TextBlock myTextBlock = new TextBlock();

// 创建MyClass对象，并传入TextBlock控件的引用
MyClass myClass = new MyClass(myTextBlock);

// 在任务/线程中调用UpdateTextBlockAsync方法更新TextBlock控件的内容
await Task.Run(() =>
{
    string newText = "Hello, world!";
    myClass.UpdateTextBlockAsync(newText).Wait();
});