.net C# 创建走马灯似的文本滚动效果显示- C# to create a revolving door like text scrolling effect

实现记事本的简单功能，包括打开、保存、复制、粘贴、删除等，很有参考价值。-To achieve a simple Notepad, including open, save, copy, paste, delete, etc., a good reference.