C#多线程Invoke示例

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public void DoWork()
{
    //错误示例：
    textbox1.text = "Hello";

    //正确示例：
    textbox1.Invoke((str) => textbox1.text = str, new Object[]{ "Hello" });
}

private void button1_Click(object sender, EventArgs e)
{
    //...
    Thread tr = new Thread(new ThreadStart(DoWork));
    tr.Start();
    //...
}