Hi Kargo,

You can try with something like this.

Here i have modified City;provider class only.Here Service is returning data from which property is getting populated.

public class CityProvider
    {

        public CityProvider()
        {
            ServiceReference2.WebService1SoapClient client = new SilverlightApplication2.ServiceReference2.WebService1SoapClient();
            client.HelloWorldCompleted+=new EventHandler<SilverlightApplication2.ServiceReference2.HelloWorldCompletedEventArgs>(client_HelloWorldCompleted);

            client.HelloWorldAsync();
        }
        void client_HelloWorldCompleted(object sender, SilverlightApplication2.ServiceReference2.HelloWorldCompletedEventArgs e)
        {
            CityList = e.Result;
        }
      
        public List<string> CityList
        {
            get;
            set;

        }
    }

you can access resource in codebehind also   and can set its property.

Some thing like below mentined code.

 public Page()
        {
            InitializeComponent();
           
            this.Loaded += new RoutedEventHandler(Page_Loaded);

     
         ServiceReference2.WebService1SoapClient client = new SilverlightApplication2.ServiceReference2.WebService1SoapClient();
         client.HelloWorldCompleted += new EventHandler<SilverlightApplication2.ServiceReference2.HelloWorldCompletedEventArgs>(client_HelloWorldCompleted);

         client.HelloWorldAsync();
        }
        void client_HelloWorldCompleted(object sender, SilverlightApplication2.ServiceReference2.HelloWorldCompletedEventArgs e)
        {
            CityProvider cprovider = ((CityProvider)(this.Resources["cityProvider"]));
            cprovider.CityList = e.Result;
        }