如何在编译/优化后看到 C# 代码？
当我看到《C# 深度剖析》中的示例章节时，我正在阅读有关 yield 关键字的内容：http://csharpindepth.com/Articles/Chapter6/IteratorBlockImplementation.aspx。
第一个代码块利用 yield 关键字来创建一个简单的迭代器。但是，第二个代码块在编译器处理完之后显示了该代码。除此之外，它将 yield 语句分解为状态机。
页面上还可以看到编译器修改代码的其他几个示例。
我的问题是：作者是否真的能够在编译后访问代码，或者他是否推断出代码会是什么样子？
I was reading about the yield keyword when I came across a sample chapter from C# in Depth: http://csharpindepth.com/Articles/Chapter6/IteratorBlockImplementation.aspx.
The first block of code utilizes the yield keyword to make a simple iterator. But, the second block of code shows this code after the compiler has had its way with it. Among other things, it has exploded the yield statement into a state machine.
Several other examples of code being modified by the compiler is evident on the page.
My question is: Was the author actually able to access the code after compilation, or did he infer what it was going to look like?
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您可以使用 Reflector 来查看，这可能是您最好的选择：
http://reflector.red-gate.com
You can have a look using Reflector, that's probably your best bet:
http://reflector.red-gate.com
作者本人提到：
在同一段落中，标题为高级概述：模式是什么？
The author himself mentioned:
in the same paragraph, titled High level overview: what's the pattern?
可能两者都有。使用 Reflector 对编译后的程序集进行逆向工程非常容易。 C# 语言规范定义了如何编译各种语法糖，是一个公共文档。作者可以使用任何一种方法，也可以混合使用两种方法。
Probably both. It's quite easy to reverse-engineer compiled assemblies using Reflector. And the C# language spec, which defines how various syntactic-sugary things are compiled, is a public document. The author could have used either approach, or a mixture of the two.
查看 ildasm 看一下在编译的 IL 中。
（真的，一旦你的眼睛进去了，这很有趣）
Check out ildasm to take a look at the compiled IL.
(Really, it's good fun once you get your eye in)
.NET CLR 实际上有一种称为 MSIL 的汇编形式，以及汇编器和反汇编器。所以是的，您可以实际编译代码，然后查看确切的编译 CLR 指令。
https://web.archive .org/web/20211020103545/https://www.4guysfromrolla.com/articles/080404-1.aspx
.NET CLR actually has a form of assembly called MSIL, along with an assembler and dissembler. So yes, you can actually compile the code, then see the exact compiled CLR instructions.
https://web.archive.org/web/20211020103545/https://www.4guysfromrolla.com/articles/080404-1.aspx
dotPeek 由 JetBrains
https://www.jetbrains.com/decompiler/
它是免费且易于使用的:)
dotPeek by JetBrains
https://www.jetbrains.com/decompiler/
It's free and easy to use :)