如何获取文件夹的缩略图？C#

using System;
using System.Drawing;
using System.IO;

public class ThumbnailGenerator
{
    public static void GenerateThumbnail(string folderPath, string thumbnailPath, int width, int height)
    {
        string[] files = Directory.GetFiles(folderPath);

        foreach (string file in files)
        {
            using (Image originalImage = Image.FromFile(file))
            {
                using (Bitmap thumbnail = new Bitmap(width, height))
                {
                    using (Graphics graphics = Graphics.FromImage(thumbnail))
                    {
                        graphics.DrawImage(originalImage, 0, 0, width, height);
                    }

                    thumbnail.Save(Path.Combine(thumbnailPath, Path.GetFileName(file)));
                }
            }
        }
    }
}

// 使用示例
string folderPath = "C:\\Path\\To\\Folder";
string thumbnailPath = "C:\\Path\\To\\ThumbnailFolder";
int width = 100;
int height = 100;

ThumbnailGenerator.GenerateThumbnail(folderPath, thumbnailPath, width, height);