<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
    <client>
      <endpoint address="net.tcp://localhost:9000/ServiceA" 
  contract="BusinessServiceContracts.IServiceA" binding="netTcpBinding" bindingConfiguration="Binding1" />
    </client>
    <bindings>
      <netTcpBinding>
        <binding name="binding1">
          <security mode="Transport">
              <message clientCredentialType="UserName"/>
          </security>
        </binding>
      </netTcpBinding>
    </bindings>   
  </system.serviceModel>   
</configuration>