线程间操作无效的解决办法

delegate void invokeRichtextBox(string netMessage);

private void button1_Click(object sender, EventArgs e)
{
Invoke(new invokeRichtextBox(OnReceivedDatagram), "gggggggg");
}
/// <summary>
/// 向richTextBox中写信息(线程安全)
/// </summary>
/// <param name="netMessage"></param>
void OnReceivedDatagram(string netMessage)
{
richTextBox1.AppendText(netMessage + "/n");
}