Dispatcher.Invoke（）WPF

Question

我得到以下Windows表格來：

if (richTextBoxReceive.InvokeRequired)
            {
                richTextBoxReceive.Invoke(new MethodInvoker(()=>
                    richTextBoxReceive.AppendText(string.Format("{0}\n\r", msg))));
            }
            else
            {
                richTextBoxReceive.AppendText(string.Format("{0}\n\r", msg));
            }



 i am using this code in WPF aplication and when i replace whit 

 if (richTextBoxReceive.Dispatcher.CheckAccess())
            {
                richTextBoxReceive.Dispatcher.Invoke(new MethodInvoker(()=>
                    richTextBoxReceive.AppendText(string.Format("{0}\n\r", msg))));
            }
            else
            {
                richTextBoxReceive.AppendText(string.Format("{0}\n\r", msg));
        }

即時通訊收到3個錯誤：

1）錯誤：WpfApplication1.MethodInvoker不包含帶有1個參數的構造函數

2）錯誤：參數1：無法從'WpfApplication1.MethodInvoker轉換為System.Delegate

3）錯誤：System.Windows.Threading.Dispatcher.Invoke（System.Delegate，params object []）的最佳重載方法匹配具有一些無效的參數

我是WPF的新手...我希望我沒有提出任何愚蠢的問題，如果您能解決我的問題，請幫助我，非常感謝！

Answer 1

richTextBoxReceive.Dispatcher.Invoke((Action)(()=> ...));