C#文件刪除

 string path = "C://Documents and Settings//Administrator.ZHOUYONG-9423D3//桌面//啊啊//11.txt";
            FileInfo file = new FileInfo(path);//文件名
            if (file.Exists)
            {
                file.Delete(); //刪除單個文件
            }

            int index = path.LastIndexOf("//");
            string fileName = path.Substring(0, index);
            DirectoryInfo fold = new DirectoryInfo(fileName);//文件夾名
            if (fold.Exists)
            {
                FileInfo[] files = fold.GetFiles("*.txt");//獲取文件對象數組
                foreach (FileInfo f in files)//刪除目錄下*.txt
                {
                    f.Delete();
                }
            }