public DuplexServiceRuntimeChannel(IChannel channel, DispatchRuntime runtime)
: base(channel, runtime)
{
// setup callback ClientRuntimeChannel.
var crt = runtime.CallbackClientRuntime;
var cd = ContractDescriptionGenerator.GetCallbackContract(runtime.Type, crt.CallbackClientType);
client = new ClientRuntimeChannel(crt, cd, this.DefaultOpenTimeout, this.DefaultCloseTimeout, channel, null,
runtime.ChannelDispatcher.MessageVersion, this.RemoteAddress, null);
}