在净为什么的String.Empty只读，而不是一个恒定的？我只是想知道是否有人知道的理由是这一决定的背后。

In .Net why is String.Empty read only instead of a constant? I'm just wondering if anyone knows what the reasoning was behind that decision.

推荐答案

这静态只读用于常量，而不是其原因是由于与非托管code使用，微软在Shared来源通用语言基础结构2.0发行。要看该文件是 sscli20 CLR的 src BCL SYSTEM string.cs 。

The reason that static readonly is used instead of const is due to use with unmanaged code, as indicated by Microsoft here in the Shared Source Common Language Infrastructure 2.0 Release. The file to look at is sscli20clrsrcbclsystemstring.cs.

在空不变持有空   字符串值。我们需要调用   String构造，使得   编译器不会将此标记为   文字。

The Empty constant holds the empty string value. We need to call the String constructor so that the compiler doesn't mark this as a literal.

标记此为文字将意味着   它不作为一个场显示   我们可以从本地访问。

Marking this as a literal would mean that it doesn't show up as a field which we can access from native.

我发现从这个方便的文章，在$ C $的CProject 。