What Does the [Flags] Attribute Really Do?

Question

What does applying [Flags] really do?

I know it modifies the behavior of Enum.ToString, but does it do anything else? (e.g. Different compiler or runtime behavior, e

Answer 1

If you ask what it does under the hood, as far as I know, it changes the ToString() method, nothing other.

Under .Net 4 you have the HasFlags-method to check for specific flags. If I interpret msdn right, you have to use the flags-attribute for using this method. But I have not tried it.