app.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
        <bindings>
            <customBinding>
                <binding name="DistributorServiceBinding">
                    <textMessageEncoding messageVersion="Soap12" />
                    <httpsTransport />
                </binding>
            </customBinding>
        </bindings>
        <client>
            <endpoint address="https://example.com:8443/test/ws/DistributorsService"
                binding="customBinding" bindingConfiguration="DistributorServiceBinding"
                contract="Service.DistributorServiceType" name="DistributorServicePort" />
        </client>
    </system.serviceModel>
</configuration>