如何在C＃中使用Java风格的throws关键字？ [英] How to use Java-style throws keyword in C#?

问题描述

在Java中， throws 关键字允许一个方法来声明它不会自己处理一个异常，而是把它抛到调用方法。

In Java, the throws keyword allows for a method to declare that it will not handle an exception on its own, but rather throw it to the calling method.

在C＃中有一个类似的关键字/属性？

Is there a similar keyword/attribute in C#?

如果没有等价物，你如何完成相同的（或类似的）效果？

If there is no equivalent, how can you accomplish the same (or a similar) effect?

推荐答案

在Java中，您必须处理异常或将该方法标记为可以使用 throws 关键字。

In Java, you must either handle an exception or mark the method as one that may throw it using the throws keyword.

C＃没有这个关键字或者一个等同的关键字，像C＃中一样，如果你没有处理例外，它会冒泡，直到被捕获或者没有被捕获才会终止程序。

C# does not have this keyword or an equivalent one, as in C#, if you don't handle an exception, it will bubble up, until caught or if not caught it will terminate the program.

如果你想处理它，那么重新抛出你可以执行以下操作：

If you want to handle it then re-throw you can do the following:

try
{
  // code that throws an exception
}
catch(ArgumentNullException ex)
{
  // code that handles the exception
  throw;
}

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