How do I determine the source IP of a multicast packet in C#?

Question

I need to determine the IP of a machine that has sent me a multicast packet, so that I can respond to it via unicast.

I\'m using the following csharp (.Net 3.5) code

Answer 1

Isn't your answer in the LocalEndPoint variable, which is the EndPoint of the packet's source, i.e., the dude on the other end. Note that I would probably rename this variable something like "remoteEP", and initialize it to something non-specific to avoid confusion.