C#非UI跨线程调用

private void UpdateUI(string message)
{
    if (InvokeRequired)
    {
        Invoke(new Action<string>(UpdateUI), message);
        return;
    }

    // 更新UI元素
}

private SynchronizationContext _syncContext;

public Form1()
{
    InitializeComponent();
    _syncContext = SynchronizationContext.Current;
}

private void UpdateUI(string message)
{
    _syncContext.Post(state =>
    {
        // 更新UI元素
    }, null);
}

private void Button1_Click(object sender, EventArgs e)
{
    Task.Factory.StartNew(() =>
    {
        // 执行耗时操作
    }).ContinueWith(task =>
    {
        // 更新UI元素
    }, TaskScheduler.FromCurrentSynchronizationContext());
}

private async void Button1_Click(object sender, EventArgs e)
{
    await Task.Run(() =>
    {
        // 执行耗时操作
    });

    // 更新UI元素
}