<configuration>
    <system.runtime.remoting>
        <application>
            <client>
                <wellknown
                    type="ChatCoordinator, ChatCoordinator"
                    url="http://localhost:8080/Chat"
                />
            </client>
            <channels>
                <channel
                    ref="http"
                    port="0"
                />
            </channels>
        </application>
    </system.runtime.remoting>
</configuration>