C# File.ReadAllText() 在给定目录路径时抛出“错误”异常 - 为什么？

Question

C# method File.ReadAllText(string filePath) does not accept a directory path as argument - it needs a path to a file. I understand that.

But why does it in this case throw an UnauthorizedAccessException instead of an ArgumentException? I think this is not intuitive.

Has anybody an explanation that makes me feel better about this?

Answer 1

File.ReadAllText throws UnauthorizedAccessException in the following cases:

path specified a file that is read-only.
-or-
This operation is not supported on the current platform.
-or-
path specified a directory.
-or-
The caller does not have the required permission.

Refer to the documentation for File.ReadAllText for more info.

Answer 2

This happens when your final exe file needs some privilleges.

Try to run as an admin.