FxCop - Interpreting Messages

Trying FxCop for the first time, and, well, looks like I have some problems. Trying to start at the top and get rid of critical errors.

My app is a service that reads and writes to sockets and text files. A critical error says "Assemblies specify permission requests". I have added no security specifications.

Does this mean that I should explicitly request permissions for doing whatever my app needs to do?

Thanks,
Mike

ok, I added this right below my imports statement:

VB Code:

<Assembly: SecurityPermissionAttribute(SecurityAction.RequestMinimum)>

and now FxCop doesn't complain. Of course, I have no idea what I just did. I've been swimming around MSDN on this and am quite lost.

I think if I could just set socket and IO permissions, that would be good. Anyone know how?