unity创建文件夹/文件 删除路径下所有文件

//判断路径/文件夹是否存在
 if (!Directory.Exists(path))
            Directory.CreateDirectory(path);//不存在则创建



//创建文件
var fs = File.Create(path + "/" + downloadVideoName + ".mp4"); //path为你想保存文件的路径。downloadVideoName 为文件名
                fs.Write(www.bytes, 0, www.bytes.Length);
                fs.Close();



 /// <summary>
    /// 删除路径下所有文件和文件夹
    /// </summary>
    /// <param name="path"></param>
    void DeleteFell(string path)
    {
        DirectoryInfo dir = new DirectoryInfo(path);
        FileSystemInfo[] fileSystems = dir.GetFileSystemInfos();
        foreach (var item in fileSystems)
        {
            if (item is DirectoryInfo)//判断是否是文件夹
            {
                DirectoryInfo directory = new DirectoryInfo(item.FullName);
                directory.Delete(true);
            }
            else
            {
                File.Delete(item.FullName);//删除这个文件
            }
        }
    }