I created a simple client and server using the remoting example in the MSDN
Library.

Run the server and client, works fine.

Now run a second instance of the client (at the same time as the first) and
I get the following exception:
"Only one usage of each socket address
(protocol/network address/port) is normally permitted"

Right, need to set the socket option SO_REUSEADDR on the TCP socket!

But I can't figure out how to do this with a TcpChannel. I'm creating the
channel like so:

BinaryServerFormatterSinkProvider provider = new
BinaryServerFormatterSinkProvider();
provider.TypeFilterLevel = TypeFilterLevel.Full;
IDictionary props = new Hashtable();
props["port"] = 8081;
TcpChannel channel = new TcpChannel(props, null, provider);
ChannelServices.RegisterChannel(channel);

The exception occurs within the TcpChannel constructor, so what ever I need
to do, I need to do before this point.
I've searched the docs, I've tried adding various key/value pairs to props
(i.e. socket_ReuseAddress, etc.)
I can't seem to find the answer.

What is the 'correct' way to go about allowing multiple clients to access
the same remoting object?