引用Microsoft.WindowsAPICodePack.dll文件。
using Microsoft.WindowsAPICodePack.Shell;
ShellFile shellFile = ShellFile.FromFilePath(@"C:Userslsl-xiaomiDesktop新建文件夹BEYOND - 不再犹豫.mp3");
Bitmap shellThumb = shellFile.Thumbnail.ExtraLargeBitmap;
shellThumb.Save(@"C:Userslsl-xiaomiDesktop新建文件夹111111.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);