public class DirectoryCopyHelper
{

    public static void CopyDirectory(string srcPath,
        string dstPath)
    {
        // 目标目录不存在则创建
        if (!System.IO.Directory.Exists(dstPath))
        {
            System.IO.Directory.CreateDirectory(dstPath);
        }

        // 获取源目录下的所有文件和子目录
        string[] files = System.IO.Directory.GetFiles(srcPath);
        string[] directories = System.IO.Directory.GetDirectories(srcPath);

        // 复制文件
        foreach (string file in files)
        {
            string fileName = System.IO.Path.GetFileName(file);
            string destFile = System.IO.Path.Combine(dstPath, fileName);
            System.IO.File.Copy(file, destFile, true);
        }

        // 递归复制子目录
        foreach (string directory in directories)
        {
            string dirName = System.IO.Path.GetFileName(directory);
            string destDir = System.IO.Path.Combine(dstPath, dirName);
            CopyDirectory(directory, destDir);
        }
    }
}