c# - C＃的隐藏功能？ [关闭](Hidden Features of C#? [closed])

Question

This came to my mind after I learned the following from this question :

(从这个问题中学到以下内容后，我想到了这一点 ：)

where T : struct

We, C# developers, all know the basics of C#.

(我们C＃开发人员都知道C＃的基础知识。)

I mean declarations, conditionals, loops, operators, etc.

(我的意思是声明，条件，循环，运算符等。)

Some of us even mastered the stuff like Generics , anonymous types , lambdas , LINQ , ...

(我们中有些人甚至掌握了泛型 ， 匿名类型 ， lambdas ， LINQ等...)

But what are the most hidden features or tricks of C# that even C# fans, addicts, experts barely know?

(但是，即使C＃爱好者，成瘾者，专家也几乎不知道C＃最隐藏的功能或技巧是什么？)

Here are the revealed features so far: (到目前为止，这里是一些揭示的功能：)

Keywords (关键词)

• yield by Michael Stum

  (yield由迈克尔葡萄汁)

• var by Michael Stum

  (var by Michael Stum)

• using() statement by kokos

  (由kokos using()语句)

• readonly by kokos

  (由kokos readonly)

• as by Mike Stone

  (as Mike Stone)

• as / is by Ed Swangren

  (as / is 埃德·斯旺格 （ Ed Swangren）的)

• as / is (improved) by Rocketpants

  (as / is （改善）由Rocketpants)

• default by deathofrats

  (default通过deathofrats)

• global:: by pzycoman

  (global::通过pzycoman)

• using() blocks by AlexCuse

  (AlexCuse的 using()块)

• volatile by Jakub ?turc

  (由Jakub?turc volatile)

• extern alias by Jakub ?turc

  (Jakub?turc提供的 extern alias)

Attributes (属性)

• DefaultValueAttribute by Michael Stum

  (Michael Stum的 DefaultValueAttribute)

• ObsoleteAttribute by DannySmurf

  (DannySmurf的 ObsoleteAttribute)

• DebuggerDisplayAttribute by Stu

  (Stu的 DebuggerDisplayAttribute)

• DebuggerBrowsable and DebuggerStepThrough by bdukes

  (<a href="https://stackoom.co

Answer 1

This isn't C# per se, but I haven't seen anyone who really uses System.IO.Path.Combine() to the extent that they should.

(这本身不是C＃，但是我还没有见过真正使用System.IO.Path.Combine()的人。)

In fact, the whole Path class is really useful, but no one uses it!

(实际上，整个Path类确实很有用，但是没有人使用它！)

I'm willing to bet that every production app has the following code, even though it shouldn't:

(我敢打赌，每个生产应用程序都具有以下代码，即使它不应该具有以下代码：)

string path = dir + "\" + fileName;