winform中使用TextBox滚动显示日志信息

        private void ShowInfo(string msg)
        {
            this.BeginInvoke((Action)(() =>
            {
                textBox1.AppendText(string.Format("{0} {1}", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), msg));
                textBox1.AppendText(Environment.NewLine);               
                textBox1.ScrollToCaret();
            }));
        }