<appSettings>
<add key ="WCFServiceAddress" value ="http://192.168.100.107/ProspectTaskWcfService/SilverLight_Service.svc"/>
</appSettings >

<param name="source" value="ClientBin/Jurassic.ProspectTask.Web.Control.WorkPlan.xap"/>
<param name="onerror" value="onSilverlightError" />
<param name="background" value="white" />
<param name="minRuntimeVersion" value="3.0.40624.0" />
<param name="autoUpgrade" value="true" />
<param name="initParams" value="wcfServiceUrl=<%=ConfigurationManager.AppSettings["WCFServiceAddress"] %> " />

<param name="initParams" value="wcfServiceUrl=<%=ConfigurationManager.AppSettings["WCFServiceAddress"] %>,webSiteUrl=<%=ConfigurationManager.AppSettings["WebSite"] %> " />

        private  IDictionary<string, string> _customConfigurations;public IDictionary<string, string> CustomConfigurations{get { return _customConfigurations; }}public App(){this.Startup += this.Application_Startup;this.Exit += this.Application_Exit;this.UnhandledException += this.Application_UnhandledException;InitializeComponent();}private void Application_Startup(object sender, StartupEventArgs e){_customConfigurations = e.InitParams;this.RootVisual = new MainPage();}

public class WcfService{public WcfService(){}public SilverService.SilverLightClient GetWCF(){App application = (App)Application.Current;string url = application.CustomConfigurations["wcfServiceUrl"];BasicHttpBinding binding = new BasicHttpBinding(BasicHttpSecurityMode.None);binding.MaxReceivedMessageSize = int.MaxValue;binding.MaxBufferSize = int.MaxValue;//SilverService.SilverLightClient client = new SilverService.SilverLightClient(binding, new EndpointAddress(new Uri(url)));return client;}}

            WcfService wcf = new WcfService();SilverService.SilverLightClient client = wcf.GetWCF();client.UpdatePlanCompleted += new EventHandler<System.ComponentModel.AsyncCompletedEventArgs>(OnCompleted);client.UpdatePlanAsync(_planEntity);