C# 在C语言中，有没有一种方法可以在多行上分割插值字符串，同时在运行时根据性能执行相同的操作

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}";

我的目标是：预定地点的新线，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}";

然而，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

另外，我不认为换行是一个好的答案>TLDR String.Format正在被调用以进行插值，所以连接正在被插值的字符串意味着更多地调用String.Format 让我们看看IL 为了更好地了解当您遇到这些问题时实际发生的情况，最好查看IL中间语言，这是您的代码编译成的语言，然后在.NET运行时上运行。您可以使用检查编译的.NET DLL和EXE的IL

连接多个字符串 在这里您可以看到，在幕后，正在为每个连接的字符串调用String.Format

使用一个长字符串 在这里，您可以看到字符串格式只被调用一次，这意味着如果您讨论的是性能，那么这种方式会稍微好一点

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编译此文件并检查IL。如果编译器将其优化为单个字符串，我不会感到惊讶。因此，没有运行时连接。在这种情况下，我可以想象编译器可能会优化这些concats，当然，如果其中有任何变量或格式，它就无法做到这一点。@wablab IL是什么？IL代表中间语言，您可以在此处查看有关它的更多信息：您有一个性能问题。您的性能测试显示了什么？如果您没有性能测试，并且担心性能，那么您如何知道代码是否太慢？很好的分析。这是调试版本还是发布版本？这有区别吗？只是想知道这是不是在发布版本中得到优化的东西之一。@wablab都是发布版本