How to set the read-only property of a directory and its content programmatically?

[nabeelisnabeel]

Well that was just an illustration to show how to do it. You can always do something like this

DirInfo.Attributes |= FileAttributes.ReadOnly;

That would make sure that all other attributes are saved.

I tested it several times and it does work.

How bitwise OR operator will accomplish the given task, can you explain a bit