C# 設置textBox默認值

參考鏈接：

• https://blog.csdn.net/kuguhuan/article/details/98625613
• https://bbs.csdn.net/topics/80098223
• https://zhidao.baidu.com/question/1366186991831111419.html
• https://www.cnblogs.com/tommy-huang/p/5147705.html
  我直接用的數組，TMD