字符串与字符串！ [英] string versus String !

问题描述

字符串与字符串！

我有一个问题(有点尴尬，因为我这么晚才看到). String和string有什么区别?不能以String为类，而string为引用类型的方式.而是如何在使用方面考虑它们.

string versus String!

I have a question (a little embarrassing because I see it so late). What is the difference between String and string? Not in the way that String is a Class and string is a reference type. But rather how to think about them in the term of uses.

我搜索并找到了这块黄金，但是我不知道如何很好地使用它:

I searched and find this piece of gold, but I don''t know how to use it very well:

• 使用字符串"来专门指代String类.
• 在引用String类的对象时，请使用字符串".

如何相应地使用它们?

How to use them, accordingly?

再次感谢.

推荐答案

字符串==字符串.它们是同一类的别名，就像ulong是UInt64的别名

String == string. They''re aliases of the same class, just like ulong is an alias of UInt64

一样. string是String的C#别名(实际上是System.String).当代码编译时，所有string类型都将在IL中转换为System.String.个人而言，我更喜欢在键入变量时使用string，在访问变量时使用String类的静态成员.这只是个人喜好，因为我认为这使代码更易于遵循.像这样的代码没有什么问题:

There is no difference. string is the C# alias to String (which is really System.String). When the code compiles, all of your string types are converted to System.String in the IL.

Personally, I prefer using string when I am typing a variable and String when I am acessing static members of the class. This is only personal preference as I think it makes the code easier to follow. There is nothing wrong with code like:

bool empty = string.IsNullOrEmpty("");

而不是

bool empty = String.IsNullOrEmpty("");

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