c# - 有没有一种方法可以将插值的字符串拆分为C#中的多行，同时在运行时在性能上执行相同的操作

我一直在与同事讨论格式化以下代码的最佳方法。

return $" this is a really long string.{a} this is a really long string. this is a really long string. this is a really long string. this is a really long string. this is a really long string. this is a really long string. this is a really long string. this is a really long string. this is a really long string. this is a really long string. this is a really long string.{b} this is a really long string. this is a really long string. this is a really long string. this is a really long string. this is a really long string. this is a really long string.{c}";

我的定位是：（在指定点上换行，即大约80个字符）

return  $" this is a really long string.{a} this is a really long string. this is a really long string." +
        $" this is a really long string. this is a really long string. this is a really long string." +
        $" this is a really long string. this is a really long string. this is a really long string." +
        $" this is a really long string. this is a really long string. this is a really long string." +
        $"{b} this is a really long string. this is a really long string. this is a really long string." +
        $" this is a really long string. this is a really long string. this is a really long string.{c}";

但是我担心我在运行时添加了不必要的工作。是这样吗
如果是这样，有没有更好的方法呢？

我也不认为换行是一个很好的答案> <

最佳答案

TLDR String.Format正在进行插值，因此，将要插值的字符串串联意味着对String.Format的更多调用

让我们看一下IL

要更好地了解遇到这些问题时实际发生的情况，请检查一下IL（中间语言），这是将代码编译为可在.NET运行时上运行的语言。您可以使用ildasm来检查已编译.NET DLL和EXE的IL。

串联多个字符串

因此，在这里您可以看到，在幕后，每个串联的字符串都被调用String.Format。



使用一个长字符串

在这里，您看到String格式仅被调用一次，这意味着如果您在谈论性能，则这种方法会稍微好一点。