使用System.IO在C#中复制文件夹

using System;
using System.IO;

namespace CopyFolder
{
    class Program
    {
        static void Main(string[] args)
        {
            string sourceFolder = @"C:\source";
            string destinationFolder = @"C:\destination";

            CopyFolderRecursively(sourceFolder, destinationFolder);
        }

        static void CopyFolderRecursively(string sourceFolder, string destinationFolder)
        {
            // 检查源文件夹是否存在
            if (!Directory.Exists(sourceFolder))
            {
                throw new DirectoryNotFoundException($"Source folder '{sourceFolder}' does not exist.");
            }

            // 创建目标文件夹
            Directory.CreateDirectory(destinationFolder);

            // 获取源文件夹下的所有文件和文件夹
            string[] files = Directory.GetFiles(sourceFolder);
            string[] folders = Directory.GetDirectories(sourceFolder);

            // 复制文件夹下的所有文件
            foreach (string file in files)
            {
                string fileName = Path.GetFileName(file);
                string destFile = Path.Combine(destinationFolder, fileName);
                File.Copy(file, destFile);
            }

            // 复制文件夹下的所有文件夹
            foreach (string folder in folders)
            {
                string folderName = Path.GetFileName(folder);
                string destFolder = Path.Combine(destinationFolder, folderName);
                CopyFolderRecursively(folder, destFolder);
            }
        }
    }
}