问题描述
我想创建和打开一个文件，但只有当犯规存在的话。我不想使用File.Exists，因为它创建具有相同名称的文件后，切换线程。
I want to create and open a file but only if it doesnt exist. I dont want to use a File.Exists because a thread by switch after it creating a file with the same name.
我如何检查是否异常System.IO。 IOException异常是由现有的文件引起的？我不喜欢解析错误味精（即使寿它可以像.indexOf简单（存在））
How do i check if the exception System.IO.IOException was caused by the file existing? I prefer not to parse the error msg (even tho it can be as simple as .indexOf("exist"))
我应该怎么做呢？
推荐答案
您应该避免以往任何时候都使得基础上，Exception.Message属性的内容逻辑的决定。被定义为人类可读的消息时，不是对一个程序来读取。这些消息如有更改，恕不另行通知。
You should avoid ever making logic decisions based on the contents of the Exception.Message property. That is defined to be a human-readable message, not something for a program to read. Such messages are subject to change without notice.
可读信息经常改变，使他们更容易阅读到人类。这不会使你的程序更幸福。
Human-readable messages often change to make them more readable to humans. That won't make your program any happier.
正如你可能能够告诉，这取决于人类可读的消息程序逻辑的问题是我的忌讳 - 我不会告诉你多久，因为这会让我觉得自己老了。这已经心烦意乱我从东西应该是很明显的。
As you might be able to tell, the issue of program logic depending on human-readable messages is a pet peeve of mine - I won't tell you for how long, since that would make me feel old. This has distracted me from something that should have been obvious.
请检查一下，如果你得到一个的。尝试追赶，与其IOException异常。
Please check to see if you get a System.IO.FileNotFoundException when the file does not exist. Try catching that instead of IOException.
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