ui線程訪問(wèn)時(shí)候 用invoke激發(fā)，字符串是拼接的末端加了\r\n  為什么不會(huì)換行？

MethodInvoker 和action好像都可以實(shí)現(xiàn)，區(qū)別在哪，或者更好一點(diǎn)



strQR = string.Format("{0}:{1}", "二維碼", HandleCodeString(QRCodeArr));


   public void Show(string msg)
        {
            richTextBox1.Invoke(new MethodInvoker(delegate() {
                richTextBox1.AppendText(msg + "\r\n");
                if (richTextBox1.Lines.Length > 2000)
                {
                    richTextBox1.Clear();
                }
                richTextBox1.ScrollToCaret();
            }));          
        }

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