protected override void OnStart(string[] args)
        {
            Uri serviceUri = new Uri("http://localhost:8080/");
            service = new MyService();
            _host = new ServiceHost(service, serviceUri);
            _host.Open();
        }

<?xml version="1.0"?>
<configuration>
  <system.serviceModel>
    <services>
      <service name="NameSpace.MyService" behaviorConfiguration="MyBehavior">
        <endpoint address="http://localhost:8080/MyService" binding="basicHttpBinding" contract="NameSpace.IMyService"/>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="MyBehavior">
          <serviceMetadata httpGetEnabled="True"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
  </startup>
</configuration>

private void button1_Click(object sender, RoutedEventArgs e)
        {
            MyServiceClient client = new MyServiceClient();
            client.GetDataCompleted += client_GetDataCompleted;
            client.GetDataAsync();            
        }