C# Stringbuilder 在添加大量文本时损坏内容

Question

我运行遇到了 stringbuilder 的问题，我似乎无法解决。为了简化问题，我创建了以下方法：

private static string TestBigStrings() {
  StringBuilder builder = new StringBuilder();

  for (int i = 1; i < 1500; i++) {
    string line = "This is a line isn't too big but breaks when we add to many of it.";
    builder.AppendLine(line);
  }

  return builder.ToString();
}

它应该只是将该行添加 1500 次，然后将它组合成一个字符串并 return 它。然而，不仅仅是组合它会破坏内容。在结果中间的某个地方，您会找到文本：

This is a line isn't too big but breaks when we add to many of it. 
This is a line isn't too big but breaks when we add to many of it. 
This is a line isn't too big but breaks when we add to many of it. 
This is a line isn't too big but breaks when we add to many of ...s a line isn't too big but breaks when we add to many of it. 
This is a line isn't too big but breaks when we add to many of it. 
This is a line isn't too big but breaks when we add to many of it. 
This is a line isn't too big but breaks when we add to many of it.

该项目是一个简单的控制台。我还尝试了所有其他解决方案来检查这是否可行，例如：

正在将文本写入文件（同样的损坏并提前中断）
将其写入内存流并读取（同样的损坏）
使用列表并加入该列表（同样损坏）
仅在字符串上使用 +=（同样损坏）
使用 string.concat（同样的损坏）

我问过的所有同事都运行遇到同样的问题，所以它应该与 PC 无关。有人知道这里发生了什么吗？

Answer 1

这是您遇到的情况吗？

嗯，这只是调试器在骗你。它会缩短太长的字符串以避免过多的内存使用。

我将该字符串写入一个文件，用一个简单的：

File.WriteAllText("BigString.txt", str);

猜猜看：字符串如预期的那样在那里，并且没有以任何方式损坏。

C# Stringbuilder 在添加大量文本时损坏内容

C# Stringbuilder corrupting content when adding lots of text

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