重构：替换为 Constant String.Empty
我有以下代码行
Dim a As String = ""
，重构建议将 "" 替换为 String.Empty
这是一种重构，但为什么呢？由于我是我未来声明的新手，我应该更好地使用 String.Empty 吗？
I have the following line of code
Dim a As String = ""
and the Refactor suggests replacing the "" with String.Empty
It is a kind of Reafactoring but why? Since i am a newbie in the future declarations of mine should i better use the String.Empty ?
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这实际上主要是一个偏好问题。就我个人而言，我发现 String.Empty 更清楚地显示了程序员的意图（例如，他没有意外地放置空字符串而不是空格）......这可能就是“Refactor”建议它的原因。但除此之外，它们是完全相同的。按照您认为合适的方式进行此操作。
It's mostly a matter of preference really. Personally, I find String.Empty more clearly shows the programmer's intent (for example, that he didn't accidentally put an empty string instead of a space)... that's probably why "Refactor" suggests it. But other than that, they're exactly the same thing. Do as you see fit on this one.
String.Empty 字段的值为零- 长度字符串，“”。
在应用程序代码中，此字段最常用于将字符串变量初始化为空字符串的赋值。要测试字符串的值是否为 null 或 String.Empty，请使用 IsNullOrEmpty 方法。
The value of the String.Empty field is the zero-length string, "".
In application code, this field is most commonly used in assignments to initialize a string variable to an empty string. To test whether the value of a string is either null or String.Empty, use the IsNullOrEmpty method.
这很大程度上取决于个人喜好。我更喜欢尽可能使用常量，特别是如果我正在使用的框架已经提供了常量。我不会竭尽全力消除代码中所有“”的使用。 （特别是因为编译器将折叠字符串文字的所有重复项，并仅在运行时保留其中之一。）
It's pretty much a matter of personal preference. I prefer using constants whenever possible, especially so if they are already provided by the framework I'm using. I wouldn't go out of my way to eliminate every use of "" in the code. (Especially since the compiler will fold all repetitions of a string literal and keep only one of them for runtime.)
"" 可能会创建一个新的 String 对象，而 String.Empty 则引用预定义的（现有的）对象。这是一个小问题，但这就是重构工具的作用：找到各种问题，包括小问题。
"" potentially creates a new String object, while String.Empty refers to a predefined (existing) object. It's a minor nitpick, but that's what refatoring tools do: find all kinds of issues, inluding minor nitpicks.
我总是采取相反的做法，将字符串设置为
null。实际上在某些情况下，您想要使用“”来表示您已经构建了一个字符串但没有内容。通常你的意思是你没有构建字符串。这就是为什么我更喜欢null构造。I always go the opposite and set the string to
null. There are really a few situations where want you want to mean with "" is that you have a string built but with no content. Usually what you mean is that you have the string unbuilt. That's why I prefer thenullconstruct.