title: C# Firewall, delete specific entry
body: <p>I am currently programming a windows-firewallmanager for a company.<br>
  Problem is, that I can only delete an entry by name and not by an INetFwRule object or something.<br>
  There are entries, that have the same name two times where one is for TCP and the other one for UDP and we might want to delete only one of them.<br>
  I could delete both and create one of them afterwards again, but I would not like to use that workaround.<br>
  Does anyone have an easy solution to this?</p>