复制文件到指定目录,如果目录不存在则创建目录

public static void CopyFile(String fileFrom,String fileTo)
    {
        String[] folders = fileTo.Split('//');

        String dir=folders[0];
        for (int i = 1; i < folders.Length-1;i++ )
        {
            dir += "//" + folders[i];

            MakeFolder(dir);
        }

        File.Copy(fileFrom,fileTo);
    }

    public static void MakeFolder(String folder)
    {
        DirectoryInfo directoryInfo = new DirectoryInfo(folder);
        if (directoryInfo.Exists == false)
        {
            directoryInfo.Create();
        }
    }