如何从另一个类更新Windows窗体GUI？

public delegate void UpdateGUIEventHandler(object sender, EventArgs e);
public event UpdateGUIEventHandler UpdateGUIEvent;

private void OnUpdateGUI(object sender, EventArgs e)
{
    // 更新GUI的代码
}

private void UpdateGUI()
{
    UpdateGUIEvent?.Invoke(this, EventArgs.Empty);
}

public class OtherClass
{
    private MainForm mainForm;

    public OtherClass(MainForm mainForm)
    {
        this.mainForm = mainForm;
        mainForm.UpdateGUIEvent += OnUpdateGUI;
    }

    private void OnUpdateGUI(object sender, EventArgs e)
    {
        // 更新GUI的代码
    }
}

private void button1_Click(object sender, EventArgs e)
{
    UpdateGUI();
}