C# 如何使用StringBuilder写回文本文件？

目前，我的代码没有插入额外的数据，而是覆盖测试文件中的数据

代码片段如下所示：

string path = @"C:\\test.txt"; // <==NEW
StreamWriter sw = new StreamWriter(new FileStream(path, Filemode.Open, FileAccess.Write)); // <==NEW
StringBuilder Editions = new StringBuilder(400);



Editions.Insert(0, "0");
Editions.Insert(1, "0");
//Editions.Remove(9, 14);
//Editions.Insert(11, "R");
//Editions.Insert(12, "M");
//Editions.Insert(13, "A");
//Editions.Insert(14, "L");
//Editions.Insert(15, "L");
//Editions.Insert(16, " ");
//Editions.Insert(17, " ");
//Editions.Insert(18, " ");
//Editions.Insert(193, "C");
//Editions.Insert(194, "L");
sw.Write(Editions.ToString()); // <== NEW
sw.Flush(); // <== NEW
sw.Close(); // <== NEW

---

string path=@“C:\\test.txt”；// 如果需要添加更多数据，则需要在
Append
模式下打开文件

@"C:\\test.txt"; // <==NEW
StreamWriter sw = new StreamWriter(new FileStream(path, Filemode.Append, FileAccess.Write)); // <==NEW
StringBuilder Editions = new StringBuilder(400);


Editions.Insert(0, "0");
Editions.Insert(1, "0");
//Editions.Remove(9, 14);
//Editions.Insert(11, "R");
//Editions.Insert(12, "M");
//Editions.Insert(13, "A");
//Editions.Insert(14, "L");
//Editions.Insert(15, "L");
//Editions.Insert(16, " ");
//Editions.Insert(17, " ");
//Editions.Insert(18, " ");
//Editions.Insert(193, "C");
//Editions.Insert(194, "L");
sw.Write(Editions.ToString()); // <== NEW
sw.Flush(); // <== NEW
sw.Close(); // <== NEW

@“C:\\test.txt”；//您需要打开文件进行追加：）好的，我该怎么做？因为使用FileMode.Append会将我的编辑添加到文件的末尾，而不是我实际需要的位置。FileMode.Open->FileMode.Append:）请参阅我的回答为什么不尝试使用file.AppendAllText…？\FileMode.Append会将我的编辑添加到文件的末尾，而不是我需要放置它们的位置。我可以告诉你吗问题需要进一步改进：）