是什么在C＃中的文件和FileInfo的区别？ [英] What is the difference between File and FileInfo in C#?

问题描述

我一直在读的静态方法文件的类最好是用在像检查，看看是否存在对文件进行小一些任务，我们应该使用实例在的FileInfo 类，如果我们要在一个特定的文件执行许多操作。

I've been reading that the static methods of the File Class are better used to perform small and few tasks on a file like checking to see if it exists and that we should use an instance of the FileInfo Class if we are going to perform many operations on a specific file.

我理解这一点，可以简单地使用这种方式盲目的，但我想知道为什么是有区别吗？这是关于他们的工作，使它们适用于不同情况的方式呢？什么是具有似乎做同样以不同的方式这2个不同类别的地步？

I understand this and can simply use it that way blindly but I would like to know why is there a difference ? What is it about the way they work that make them suitable for different situations ? What is the point of having this 2 different classes that seem do the same in different ways ?

这将是有益的，如果有人能回答这个问题的至少一个。

It would be helpful if someone could answer at least one of this questions.

推荐答案

一般来说，如果你在一个文件执行单个操作，使用文件类。如果在同一个文件进行多次操作，可以使用的FileInfo 。

Generally if you are performing a single operation on a file, use the File class. If you are performing multiple operations on the same file, use FileInfo.

之所以做这种方式是因为安全的访问文件时，检查完成的。当您创建的FileInfo 的一个实例，检查只执行一次。不过，每次使用一个静态文件进行检查方法。

The reason to do it this way is because of the security checking done when accessing a file. When you create an instance of FileInfo, the check is only performed once. However, each time you use a static File method the check is performed.

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