目录1.引入头文件2.路径（Path）创建路径路径操作3.文件操作检查文件状态创建和删除文件复制和移动文件4.目录操作遍历目录获取目录内容5.文件状态和权限获取文件状态修改文件权限6.文件流与文件系统7.错误处理8.示例
Windows Forms\' CheckBox control implements both CheckedChanged and CheckStateChanged events. As far as I can tell, both fire when the checked status of the checkbox is changed.
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