c# - System.IO.File 和 System.IO.FileInfo 有什么区别

Question

为什么有两个用于几乎相同目的的类 System.IO.File 和 System.IO.FileInfo。

Answer 1

System.IO.File提供与处理文件相关的静态成员，而 System.IO.FileInfo表示一个特定文件并包含用于处理该文件的非静态成员。

来自 MSDN:

Because all File methods are static, it might be more efficient to use a File method rather than a corresponding FileInfo instance method if you want to perform only one action. All File methods require the path to the file that you are manipulating.

The static methods of the File class perform security checks on all methods. If you are going to reuse an object several times, consider using the corresponding instance method of FileInfo instead, because the security check will not always be necessary.