how to get mac address of external IP in C#

Question

how to get mac address of external IP in C# ? E.g I want to find mac address of \"204.13.153.34\" ?

Any ideas and code snippet is highly appreciated ? Thanks in Advance<

Answer 1

I don't think that's possible unless you write something on the other end that sends it to you?

EDIT:

This looks like it might be able to help Retrieve MAC Address

EDIT: You cannot get an external MAC address of a user without having local LAN access to them... UNLESS: you have access to a good ARP table and only if the client is connected DIRECTLY to the php server (if there are routers/gateways that NAT the traffic, the returned MAC address will be that of the gateway) - Source

It talks about php but the principal will be the same for C#