其中内置的.NET异常，我可以从我的申请扔？ [英] Which built-in .NET exceptions can I throw from my application?
问题描述
如果我需要从我的应用程序，它的内置.NET异常类我可以用抛出一个异常？他们都是公平的游戏？我应该在什么时候得到我自己的？
If I need to throw an exception from within my application which of the built-in .NET exception classes can I use? Are they all fair game? When should I derive my own?
推荐答案
请参阅创建和引发异常的。
在投掷内置例外，它说：
On throwing built-in exceptions, it says:
不要从你自己的源$ C $ C抛出System.Exception的，System.SystemException，System.NullReferenceException或System.IndexOutOfRangeException故意。
Do not throw System.Exception, System.SystemException, System.NullReferenceException, or System.IndexOutOfRangeException intentionally from your own source code.
和
不要扔一般例外
如果你把一个一般异常类型，如异常或SystemException的库或框架，它迫使消费者捕获所有异常，包括未知异常，他们不知道如何处理。
If you throw a general exception type, such as Exception or SystemException in a library or framework, it forces consumers to catch all exceptions, including unknown exceptions that they do not know how to handle.
相反，无论是抛出已存在的框架更派生类型，或者创建自己的类型，它源于例外。
Instead, either throw a more derived type that already exists in the framework, or create your own type that derives from Exception."
这<一href="http://blogs.msdn.com/fxcop/archive/2007/01/22/faq-what-exception-should-i-throw-instead-of-the-reserved-exceptions-found-by-donotraisereservedexceptiontypes.aspx"相对=nofollow>博客条目也有一些有用的指导方针。
This blog entry also has some useful guidelines.
此外，FxCop的code分析定义的不抛出异常为的此处描述。它建议：
Also, FxCop code analysis defines a list of "do not raise exceptions" as described here. It recommends:
下面的异常类型过于笼统，以提供足够的信息给用户：
The following exception types are too general to provide sufficient information to the user:
- System.Exception的
- System.ApplicationException
- System.SystemException
- System.Exception
- System.ApplicationException
- System.SystemException
下面的异常类型被保留，应该由公共语言运行时只抛出：
The following exception types are reserved and should be thrown only by the common language runtime:
- System.ExecutionEngineException
- System.IndexOutOfRangeException
- System.NullReferenceException
- 的System.OutOfMemoryException
- System.ExecutionEngineException
- System.IndexOutOfRangeException
- System.NullReferenceException
- System.OutOfMemoryException
所以理论上你可以提出任何其他的框架异常类型，为您提供清晰的了解异常的意图所描述的微软（参见MSDN文档）。
So in theory you can raise any other framework exception type, providing you clearly understand the intent of the exception as described by Microsoft (see MSDN documentation).
请注意，这些都是准则和其他一些人也表示，目前各地System.IndexOutOfRangeException是一个有争议（即不少开发商抛出此异常）。
Note, these are "guidelines" and as some others have said, there is debate around System.IndexOutOfRangeException (ie many developers throw this exception).
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