使用string.Substring拆分字符串，然后将每个部分作为一行添加到文本文件中.您对2D数组的概念有些瑕疵(仅供参考).

Use string.Substring to split up the string, then append each part as a line in a text file. Your concept of a 2D array is a little flawed (just FYI).

使用split或substring方法将您的字符串分成几部分.然后使用File.WriteAllLines将它们写入文件.

Use split or substring method to break your string in parts. Then use File.WriteAllLines to write them into file.