IP routing table lookup in .net

Question

I have a multi-homed machine and need to answer this question:

Given an IP address of the remote machine, which local interface is appropriate to use for communicati

Answer 1

I didn't know about this, so just had a look in the Visual Studio Object browser, and it looks like you can do this from the System.Net.Sockets namespace.

In that namespace is a Socket class which contains a method IOControl. One of the overloads for this method takes an IOControlCode (enum in the same namespace) which contains an entry for `RoutingInterfaceQuery'.

I'll try and put some code together as an example now.