c# Winform 多線程操作
https://www.cnblogs.com/SoftWareIe/p/9650947.html
c# winform編程之多線程ui界面資源修改總結篇
https://www.cnblogs.com/gc2013/p/3824761.html
https://www.cnblogs.com/SoftWareIe/p/9650947.html
https://www.cnblogs.com/gc2013/p/3824761.html
this.richTextBox2.SelectionStart=this.richTextBox2.Text.Length; this.richTextBox2.ScrollToCaret();