FolderToFileName 主要用于将指定目录下的目录名添加到文件名中，并将文件移动到最上层目录，批量移除冗余的目录结构。
It is mainly used to add the directory names under a specified directory to the filenames, move the files to the top-level directory, to remove redundant directory structures in batches.
.NET 8+
如果你的 Windows 没有安装过 .NET 8+ 运行环境，程序在第一次运行时将由 Windows 系统跳转到微软网站，引导你下载 .NET 桌面运行时。
如果系统没有自动跳转，你也可以手动访问微软 .NET 网站（ https://dotnet.microsoft.com/zh-cn/download/dotnet ），自行下载 .NET 桌面运行时 并安装。
If the .NET 8 (or later) runtime is not installed on your Windows system, Windows will prompt and redirect you to the Microsoft website on the first launch to download the .NET Desktop Runtime.
If you are not redirected automatically, you can manually visit the Microsoft .NET Download Page to download and install the .NET Desktop Runtime.