当必须使用我们检查经营者在C＃中？ [英] When must we use checked operator in C#?

问题描述

我们何时必须在C＃中使用检查经营者？难道只适合异常处理？

When must we use checked operator in C#? Is it only suitable for exception handling?

推荐答案

您会使用检查，以防范（静音）溢出在表达式中。结果
和使用选中当你知道会发生一种无害的溢出。

You would use checkedto guard against a (silent) overflow in an expression.
And use unchecked when you know a harmless overflow might occur.

您使用无论是在地方，你不希望依赖于默认的（项目范围）编译器设置。

You use both at places where you don't want to rely on the default (project-wide) compiler setting.

这两种形式是相当罕见的，但这样做的关键整数运算时，这是值得思考可能的溢出

Both forms are pretty rare, but when doing critical integer arithmetic it is worth thinking about possible overflow.

另外请注意，他们有两种形式：

Also note that they come in two forms:

 x = unchecked(x + 1);    // ( expression )
 unchecked { x = x + 1;}  // { statement(s) }

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