Question

What I want to do is overwrite a read-only file. With a read/write file.

With read/write files if I use File.Open(file, FileMode.Create) then if the file exists then it is deleted and a new one is created. (Although I suspect that if it exists then it just opens the file and removes the contents, which is why it is unable to cope with files it encounters as read/write).

I have tried with different FileAccess enums, but none of them seem to help me (I keep getting a UnauthorizedAccessException).

The work around is that I just set the file as read/write before I try to File.Open and make a new file, is this the only way to do this?

Thanks

Answer 1

Consider the purpose of ReadOnly. It’s to stop alterations to the file. What you’re trying to do, is alter the file (in this case by overwriting it).

What I would imagine you would need to do, is set the file attribute:

File.SetAttributes(filePath, FileAttributes.Normal);

Before you write to the file.